549039731 has 2 divisors, whose sum is σ = 549039732. Its totient is φ = 549039730.

The previous prime is 549039697. The next prime is 549039779. The reversal of 549039731 is 137930945.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549039731 is a prime.

It is a super-2 number, since 2×549039731² = 602889252433104722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (549035731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274519865 + 274519866.

It is an arithmetic number, because the mean of its divisors is an integer number (274519866).

Almost surely, 2^549039731 is an apocalyptic number.

549039731 is a deficient number, since it is larger than the sum of its proper divisors (1).

549039731 is an equidigital number, since it uses as much as digits as its factorization.

549039731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 549039731 is about 23431.5968512605. The cubic root of 549039731 is about 818.8441632391.

The spelling of 549039731 in words is "five hundred forty-nine million, thirty-nine thousand, seven hundred thirty-one".