549631387 has 2 divisors, whose sum is σ = 549631388. Its totient is φ = 549631386.

The previous prime is 549631367. The next prime is 549631441. The reversal of 549631387 is 783136945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549631387 - 2¹⁵ = 549598619 is a prime.

It is not a weakly prime, because it can be changed into another prime (549631307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274815693 + 274815694.

It is an arithmetic number, because the mean of its divisors is an integer number (274815694).

Almost surely, 2^549631387 is an apocalyptic number.

549631387 is a deficient number, since it is larger than the sum of its proper divisors (1).

549631387 is an equidigital number, since it uses as much as digits as its factorization.

549631387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 549631387 is about 23444.2186263479. The cubic root of 549631387 is about 819.1381918329.

The spelling of 549631387 in words is "five hundred forty-nine million, six hundred thirty-one thousand, three hundred eighty-seven".