30972937 has 8 divisors (see below), whose sum is σ = 32119040. Its totient is φ = 29836080.

The previous prime is 30972919. The next prime is 30972947. The reversal of 30972937 is 73927903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30972937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30972937.

It is not an unprimeable number, because it can be changed into a prime (30972947) 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 7 ways as a sum of consecutive naturals, for example, 4918 + ... + 9280.

It is an arithmetic number, because the mean of its divisors is an integer number (4014880).

Almost surely, 2^30972937 is an apocalyptic number.

It is an amenable number.

30972937 is a deficient number, since it is larger than the sum of its proper divisors (1146103).

30972937 is a wasteful number, since it uses less digits than its factorization.

30972937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4623.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 30972937 is about 5565.3335030347. Note that the first 3 decimals coincide. The cubic root of 30972937 is about 314.0466244477.

The spelling of 30972937 in words is "thirty million, nine hundred seventy-two thousand, nine hundred thirty-seven".