30842731 has 2 divisors, whose sum is σ = 30842732. Its totient is φ = 30842730.

The previous prime is 30842699. The next prime is 30842753. The reversal of 30842731 is 13724803.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30842731 - 2⁵ = 30842699 is a prime.

It is a super-2 number, since 2×30842731² = 1902548111076722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30842731.

It is not a weakly prime, because it can be changed into another prime (30848731) 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, 15421365 + 15421366.

It is an arithmetic number, because the mean of its divisors is an integer number (15421366).

Almost surely, 2^30842731 is an apocalyptic number.

30842731 is a deficient number, since it is larger than the sum of its proper divisors (1).

30842731 is an equidigital number, since it uses as much as digits as its factorization.

30842731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 30842731 is about 5553.6232317290. The cubic root of 30842731 is about 313.6059366230.

The spelling of 30842731 in words is "thirty million, eight hundred forty-two thousand, seven hundred thirty-one".