30492391 has 2 divisors, whose sum is σ = 30492392. Its totient is φ = 30492390.

The previous prime is 30492389. The next prime is 30492409. The reversal of 30492391 is 19329403.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30492391 - 2¹ = 30492389 is a prime.

Together with 30492389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30492361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15246195 + 15246196.

It is an arithmetic number, because the mean of its divisors is an integer number (15246196).

Almost surely, 2^30492391 is an apocalyptic number.

30492391 is a deficient number, since it is larger than the sum of its proper divisors (1).

30492391 is an equidigital number, since it uses as much as digits as its factorization.

30492391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 30492391 is about 5521.9915791316. The cubic root of 30492391 is about 312.4140042840.

The spelling of 30492391 in words is "thirty million, four hundred ninety-two thousand, three hundred ninety-one".