558321961 has 2 divisors, whose sum is σ = 558321962. Its totient is φ = 558321960.

The previous prime is 558321937. The next prime is 558321979. The reversal of 558321961 is 169123855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540097600 + 18224361 = 23240^2 + 4269^2 .

It is a cyclic number.

It is not a de Polignac number, because 558321961 - 2¹¹ = 558319913 is a prime.

It is not a weakly prime, because it can be changed into another prime (558321901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 279160980 + 279160981.

It is an arithmetic number, because the mean of its divisors is an integer number (279160981).

Almost surely, 2^558321961 is an apocalyptic number.

It is an amenable number.

558321961 is a deficient number, since it is larger than the sum of its proper divisors (1).

558321961 is an equidigital number, since it uses as much as digits as its factorization.

558321961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 558321961 is about 23628.8374872739. The cubic root of 558321961 is about 823.4329413200.

The spelling of 558321961 in words is "five hundred fifty-eight million, three hundred twenty-one thousand, nine hundred sixty-one".