549347839 has 2 divisors, whose sum is σ = 549347840. Its totient is φ = 549347838.

The previous prime is 549347837. The next prime is 549347861. The reversal of 549347839 is 938743945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549347839 - 2¹ = 549347837 is a prime.

Together with 549347837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549347831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274673919 + 274673920.

It is an arithmetic number, because the mean of its divisors is an integer number (274673920).

Almost surely, 2^549347839 is an apocalyptic number.

549347839 is a deficient number, since it is larger than the sum of its proper divisors (1).

549347839 is an equidigital number, since it uses as much as digits as its factorization.

549347839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 52.

The square root of 549347839 is about 23438.1705557409. The cubic root of 549347839 is about 818.9973065330.

The spelling of 549347839 in words is "five hundred forty-nine million, three hundred forty-seven thousand, eight hundred thirty-nine".