549874729 has 2 divisors, whose sum is σ = 549874730. Its totient is φ = 549874728.

The previous prime is 549874697. The next prime is 549874747. The reversal of 549874729 is 927478945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 351487504 + 198387225 = 18748^2 + 14085^2 .

It is a cyclic number.

It is not a de Polignac number, because 549874729 - 2⁵ = 549874697 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 549874729.

It is not a weakly prime, because it can be changed into another prime (549874789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274937364 + 274937365.

It is an arithmetic number, because the mean of its divisors is an integer number (274937365).

Almost surely, 2^549874729 is an apocalyptic number.

It is an amenable number.

549874729 is a deficient number, since it is larger than the sum of its proper divisors (1).

549874729 is an equidigital number, since it uses as much as digits as its factorization.

549874729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 55.

The square root of 549874729 is about 23449.4078603277. The cubic root of 549874729 is about 819.2590615168.

The spelling of 549874729 in words is "five hundred forty-nine million, eight hundred seventy-four thousand, seven hundred twenty-nine".