30917969 has 4 divisors (see below), whose sum is σ = 30934896. Its totient is φ = 30901044.

The previous prime is 30917941. The next prime is 30917981. The reversal of 30917969 is 96971903.

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 a de Polignac number, because none of the positive numbers 2^k-30917969 is a prime.

It is a super-2 number, since 2×30917969² = 1911841614169922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30917069) 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, 5339 + ... + 9504.

It is an arithmetic number, because the mean of its divisors is an integer number (7733724).

Almost surely, 2^30917969 is an apocalyptic number.

It is an amenable number.

30917969 is a deficient number, since it is larger than the sum of its proper divisors (16927).

30917969 is a wasteful number, since it uses less digits than its factorization.

30917969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16926.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 30917969 is about 5560.3928818025. The cubic root of 30917969 is about 313.8607338112.

The spelling of 30917969 in words is "thirty million, nine hundred seventeen thousand, nine hundred sixty-nine".