1055879391 has 12 divisors (see below), whose sum is σ = 1637690712. Its totient is φ = 603359568.

The previous prime is 1055879389. The next prime is 1055879443. The reversal of 1055879391 is 1939785501.

It is not a de Polignac number, because 1055879391 - 2¹ = 1055879389 is a prime.

It is a super-2 number, since 2×1055879391² = 2229762576677061762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1055879391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055879311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3591280 + ... + 3591573.

It is an arithmetic number, because the mean of its divisors is an integer number (136474226).

Almost surely, 2^1055879391 is an apocalyptic number.

1055879391 is a deficient number, since it is larger than the sum of its proper divisors (581811321).

1055879391 is an equidigital number, since it uses as much as digits as its factorization.

1055879391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182870 (or 7182863 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 48.

The square root of 1055879391 is about 32494.2978228489. The cubic root of 1055879391 is about 1018.2899036417.

The spelling of 1055879391 in words is "one billion, fifty-five million, eight hundred seventy-nine thousand, three hundred ninety-one".