549539951 has 2 divisors, whose sum is σ = 549539952. Its totient is φ = 549539950.

The previous prime is 549539927. The next prime is 549539953. The reversal of 549539951 is 159935945.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549539951 is a prime.

Together with 549539953, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 549539951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549539953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274769975 + 274769976.

It is an arithmetic number, because the mean of its divisors is an integer number (274769976).

Almost surely, 2^549539951 is an apocalyptic number.

549539951 is a deficient number, since it is larger than the sum of its proper divisors (1).

549539951 is an equidigital number, since it uses as much as digits as its factorization.

549539951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1093500, while the sum is 50.

The square root of 549539951 is about 23442.2684695829. The cubic root of 549539951 is about 819.0927657072.

The spelling of 549539951 in words is "five hundred forty-nine million, five hundred thirty-nine thousand, nine hundred fifty-one".