549913817 has 2 divisors, whose sum is σ = 549913818. Its totient is φ = 549913816.

The previous prime is 549913787. The next prime is 549913843. The reversal of 549913817 is 718319945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 549621136 + 292681 = 23444^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 549913817 - 2¹² = 549909721 is a prime.

It is a super-2 number, since 2×549913817² = 604810412255018978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (549913517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274956908 + 274956909.

It is an arithmetic number, because the mean of its divisors is an integer number (274956909).

Almost surely, 2^549913817 is an apocalyptic number.

It is an amenable number.

549913817 is a deficient number, since it is larger than the sum of its proper divisors (1).

549913817 is an equidigital number, since it uses as much as digits as its factorization.

549913817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 549913817 is about 23450.2412993982. The cubic root of 549913817 is about 819.2784734773.

The spelling of 549913817 in words is "five hundred forty-nine million, nine hundred thirteen thousand, eight hundred seventeen".