556949391 has 8 divisors (see below), whose sum is σ = 742724784. Its totient is φ = 371236800.

The previous prime is 556949381. The next prime is 556949411. The reversal of 556949391 is 193949655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 556949391 - 2¹⁸ = 556687247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556949311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11955 + ... + 35451.

It is an arithmetic number, because the mean of its divisors is an integer number (92840598).

Almost surely, 2^556949391 is an apocalyptic number.

556949391 is a deficient number, since it is larger than the sum of its proper divisors (185775393).

556949391 is a wasteful number, since it uses less digits than its factorization.

556949391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31401.

The product of its digits is 1312200, while the sum is 51.

The square root of 556949391 is about 23599.7752319805. The cubic root of 556949391 is about 822.7576160480.

The spelling of 556949391 in words is "five hundred fifty-six million, nine hundred forty-nine thousand, three hundred ninety-one".