30977929 has 2 divisors, whose sum is σ = 30977930. Its totient is φ = 30977928.

The previous prime is 30977911. The next prime is 30977951. The reversal of 30977929 is 92977903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18361225 + 12616704 = 4285^2 + 3552^2 .

It is an emirp because it is prime and its reverse (92977903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30977929 - 2¹¹ = 30975881 is a prime.

It is not a weakly prime, because it can be changed into another prime (30977129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15488964 + 15488965.

It is an arithmetic number, because the mean of its divisors is an integer number (15488965).

Almost surely, 2^30977929 is an apocalyptic number.

It is an amenable number.

30977929 is a deficient number, since it is larger than the sum of its proper divisors (1).

30977929 is an equidigital number, since it uses as much as digits as its factorization.

30977929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 214326, while the sum is 46.

The square root of 30977929 is about 5565.7819756077. The cubic root of 30977929 is about 314.0634954829.

It can be divided in two parts, 3097 and 7929, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 30977929 in words is "thirty million, nine hundred seventy-seven thousand, nine hundred twenty-nine".