555970921 has 6 divisors (see below), whose sum is σ = 611108666. Its totient is φ = 505428000.

The previous prime is 555970871. The next prime is 555970931. The reversal of 555970921 is 129079555.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 447914896 + 108056025 = 21164^2 + 10395^2 .

It is not a de Polignac number, because 555970921 - 2¹⁵ = 555938153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555970931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2297280 + ... + 2297521.

Almost surely, 2^555970921 is an apocalyptic number.

It is an amenable number.

555970921 is a deficient number, since it is larger than the sum of its proper divisors (55137745).

555970921 is a wasteful number, since it uses less digits than its factorization.

555970921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594823 (or 4594812 counting only the distinct ones).

The product of its (nonzero) digits is 141750, while the sum is 43.

The square root of 555970921 is about 23579.0356248936. The cubic root of 555970921 is about 822.2755162605.

The spelling of 555970921 in words is "five hundred fifty-five million, nine hundred seventy thousand, nine hundred twenty-one".