30977951 has 2 divisors, whose sum is σ = 30977952. Its totient is φ = 30977950.

The previous prime is 30977929. The next prime is 30977953. The reversal of 30977951 is 15977903.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30977951 is a prime.

Together with 30977953, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30977899 and 30977908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30977953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15488975 + 15488976.

It is an arithmetic number, because the mean of its divisors is an integer number (15488976).

Almost surely, 2^30977951 is an apocalyptic number.

30977951 is a deficient number, since it is larger than the sum of its proper divisors (1).

30977951 is an equidigital number, since it uses as much as digits as its factorization.

30977951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59535, while the sum is 41.

The square root of 30977951 is about 5565.7839519694. The cubic root of 30977951 is about 314.0635698304.

The spelling of 30977951 in words is "thirty million, nine hundred seventy-seven thousand, nine hundred fifty-one".