30913769 has 4 divisors (see below), whose sum is σ = 32732244. Its totient is φ = 29095296.

The previous prime is 30913747. The next prime is 30913807. The reversal of 30913769 is 96731903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24127744 + 6786025 = 4912^2 + 2605^2 .

It is not a de Polignac number, because 30913769 - 2¹² = 30909673 is a prime.

It is a super-2 number, since 2×30913769² = 1911322227570722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30913669) 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, 909212 + ... + 909245.

It is an arithmetic number, because the mean of its divisors is an integer number (8183061).

Almost surely, 2^30913769 is an apocalyptic number.

It is an amenable number.

30913769 is a deficient number, since it is larger than the sum of its proper divisors (1818475).

30913769 is a wasteful number, since it uses less digits than its factorization.

30913769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818474.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 30913769 is about 5560.0151978210. The cubic root of 30913769 is about 313.8465212047.

The spelling of 30913769 in words is "thirty million, nine hundred thirteen thousand, seven hundred sixty-nine".