30532991 has 2 divisors, whose sum is σ = 30532992. Its totient is φ = 30532990.

The previous prime is 30532979. The next prime is 30533017. The reversal of 30532991 is 19923503.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30532991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30532921) 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, 15266495 + 15266496.

It is an arithmetic number, because the mean of its divisors is an integer number (15266496).

Almost surely, 2^30532991 is an apocalyptic number.

30532991 is a deficient number, since it is larger than the sum of its proper divisors (1).

30532991 is an equidigital number, since it uses as much as digits as its factorization.

30532991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 30532991 is about 5525.6665661258. Note that the first 3 decimals coincide. The cubic root of 30532991 is about 312.5526004257.

The spelling of 30532991 in words is "thirty million, five hundred thirty-two thousand, nine hundred ninety-one".