549504139 has 2 divisors, whose sum is σ = 549504140. Its totient is φ = 549504138.

The previous prime is 549504101. The next prime is 549504161. The reversal of 549504139 is 931405945.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 549504139 - 2¹⁷ = 549373067 is a prime.

It is not a weakly prime, because it can be changed into another prime (549504169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274752069 + 274752070.

It is an arithmetic number, because the mean of its divisors is an integer number (274752070).

Almost surely, 2^549504139 is an apocalyptic number.

549504139 is a deficient number, since it is larger than the sum of its proper divisors (1).

549504139 is an equidigital number, since it uses as much as digits as its factorization.

549504139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 549504139 is about 23441.5046232105. The cubic root of 549504139 is about 819.0749726500.

The spelling of 549504139 in words is "five hundred forty-nine million, five hundred four thousand, one hundred thirty-nine".