42479831 has 2 divisors, whose sum is σ = 42479832. Its totient is φ = 42479830.

The previous prime is 42479819. The next prime is 42479863. The reversal of 42479831 is 13897424.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42479831 is a prime.

It is a super-2 number, since 2×42479831² = 3609072083577122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42479891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21239915 + 21239916.

It is an arithmetic number, because the mean of its divisors is an integer number (21239916).

Almost surely, 2^42479831 is an apocalyptic number.

42479831 is a deficient number, since it is larger than the sum of its proper divisors (1).

42479831 is an equidigital number, since it uses as much as digits as its factorization.

42479831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 42479831 is about 6517.6553299480. The cubic root of 42479831 is about 348.9213896176.

The spelling of 42479831 in words is "forty-two million, four hundred seventy-nine thousand, eight hundred thirty-one".