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897131 = 5316927
BaseRepresentation
bin11011011000001101011
31200120122002
43123001223
5212202011
631121215
710424354
oct3330153
91616562
10897131
11563034
1237320b
13255461
14194d2b
1512ac3b
hexdb06b

897131 has 4 divisors (see below), whose sum is σ = 914112. Its totient is φ = 880152.

The previous prime is 897119. The next prime is 897133. The reversal of 897131 is 131798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131798 = 265899.

It is a cyclic number.

It is not a de Polignac number, because 897131 - 26 = 897067 is a prime.

It is a super-2 number, since 2×8971312 = 1609688062322, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 897131 parts by 1339 straight cuts.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 897094 and 897103.

It is not an unprimeable number, because it can be changed into a prime (897133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8411 + ... + 8516.

It is an arithmetic number, because the mean of its divisors is an integer number (228528).

2897131 is an apocalyptic number.

897131 is a deficient number, since it is larger than the sum of its proper divisors (16981).

897131 is a wasteful number, since it uses less digits than its factorization.

897131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16980.

The product of its digits is 1512, while the sum is 29.

The square root of 897131 is about 947.1699953018. The cubic root of 897131 is about 96.4462370666.

The spelling of 897131 in words is "eight hundred ninety-seven thousand, one hundred thirty-one".

Divisors: 1 53 16927 897131