30790987 has 2 divisors, whose sum is σ = 30790988. Its totient is φ = 30790986.

The previous prime is 30790973. The next prime is 30791009. The reversal of 30790987 is 78909703.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30790987 - 2¹¹ = 30788939 is a prime.

It is not a weakly prime, because it can be changed into another prime (30790957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15395493 + 15395494.

It is an arithmetic number, because the mean of its divisors is an integer number (15395494).

Almost surely, 2^30790987 is an apocalyptic number.

30790987 is a deficient number, since it is larger than the sum of its proper divisors (1).

30790987 is an equidigital number, since it uses as much as digits as its factorization.

30790987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 30790987 is about 5548.9626958559. The cubic root of 30790987 is about 313.4304624439.

The spelling of 30790987 in words is "thirty million, seven hundred ninety thousand, nine hundred eighty-seven".