549759421 has 2 divisors, whose sum is σ = 549759422. Its totient is φ = 549759420.

The previous prime is 549759403. The next prime is 549759437. The reversal of 549759421 is 124957945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529644196 + 20115225 = 23014^2 + 4485^2 .

It is a cyclic number.

It is not a de Polignac number, because 549759421 - 2¹⁷ = 549628349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549759401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274879710 + 274879711.

It is an arithmetic number, because the mean of its divisors is an integer number (274879711).

Almost surely, 2^549759421 is an apocalyptic number.

It is an amenable number.

549759421 is a deficient number, since it is larger than the sum of its proper divisors (1).

549759421 is an equidigital number, since it uses as much as digits as its factorization.

549759421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 46.

The square root of 549759421 is about 23446.9490765856. The cubic root of 549759421 is about 819.2017916680.

The spelling of 549759421 in words is "five hundred forty-nine million, seven hundred fifty-nine thousand, four hundred twenty-one".