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30913369 = 57154139
BaseRepresentation
bin111010111101…
…1001101011001
32011011120011121
41311323031121
530403211434
63022325241
7523521304
oct165731531
964146147
1030913369
11164a4743
12a429821
136534946
144169b3b
152aa97b4
hex1d7b359

30913369 has 4 divisors (see below), whose sum is σ = 30968080. Its totient is φ = 30858660.

The previous prime is 30913343. The next prime is 30913427. The reversal of 30913369 is 96331903.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 30913369 - 29 = 30912857 is a prime.

It is a super-2 number, since 2×309133692 = 1911272765860322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30913339) 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, 26499 + ... + 27640.

It is an arithmetic number, because the mean of its divisors is an integer number (7742020).

Almost surely, 230913369 is an apocalyptic number.

It is an amenable number.

30913369 is a deficient number, since it is larger than the sum of its proper divisors (54711).

30913369 is an equidigital number, since it uses as much as digits as its factorization.

30913369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54710.

The product of its (nonzero) digits is 13122, while the sum is 34.

The square root of 30913369 is about 5559.9792265799. The cubic root of 30913369 is about 313.8451675560.

The spelling of 30913369 in words is "thirty million, nine hundred thirteen thousand, three hundred sixty-nine".

Divisors: 1 571 54139 30913369