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308897 = 1032999
BaseRepresentation
bin1001011011010100001
3120200201122
41023122201
534341042
610342025
72424401
oct1133241
9520648
10308897
111a1096
1212a915
13aa7a4
1480801
15617d2
hex4b6a1

308897 has 4 divisors (see below), whose sum is σ = 312000. Its totient is φ = 305796.

The previous prime is 308887. The next prime is 308899. The reversal of 308897 is 798803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 798803 = 4119483.

It is a cyclic number.

It is not a de Polignac number, because 308897 - 28 = 308641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (308899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397 + ... + 1602.

It is an arithmetic number, because the mean of its divisors is an integer number (78000).

2308897 is an apocalyptic number.

It is an amenable number.

308897 is a deficient number, since it is larger than the sum of its proper divisors (3103).

308897 is a wasteful number, since it uses less digits than its factorization.

308897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 308897 is about 555.7850303850. The cubic root of 308897 is about 67.5986303890.

The spelling of 308897 in words is "three hundred eight thousand, eight hundred ninety-seven".

Divisors: 1 103 2999 308897