556994693 has 2 divisors, whose sum is σ = 556994694. Its totient is φ = 556994692.

The previous prime is 556994623. The next prime is 556994723. The reversal of 556994693 is 396499655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 546484129 + 10510564 = 23377^2 + 3242^2 .

It is a cyclic number.

It is not a de Polignac number, because 556994693 - 2¹⁶ = 556929157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556994623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278497346 + 278497347.

It is an arithmetic number, because the mean of its divisors is an integer number (278497347).

Almost surely, 2^556994693 is an apocalyptic number.

It is an amenable number.

556994693 is a deficient number, since it is larger than the sum of its proper divisors (1).

556994693 is an equidigital number, since it uses as much as digits as its factorization.

556994693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7873200, while the sum is 56.

The square root of 556994693 is about 23600.7350097407. The cubic root of 556994693 is about 822.7799230150.

The spelling of 556994693 in words is "five hundred fifty-six million, nine hundred ninety-four thousand, six hundred ninety-three".