30923987 has 2 divisors, whose sum is σ = 30923988. Its totient is φ = 30923986.

The previous prime is 30923941. The next prime is 30924017. The reversal of 30923987 is 78932903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30923987 - 2¹² = 30919891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30923687) 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, 15461993 + 15461994.

It is an arithmetic number, because the mean of its divisors is an integer number (15461994).

Almost surely, 2^30923987 is an apocalyptic number.

30923987 is a deficient number, since it is larger than the sum of its proper divisors (1).

30923987 is an equidigital number, since it uses as much as digits as its factorization.

30923987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 30923987 is about 5560.9340042838. The cubic root of 30923987 is about 313.8810962026.

The spelling of 30923987 in words is "thirty million, nine hundred twenty-three thousand, nine hundred eighty-seven".