1056155979 has 4 divisors (see below), whose sum is σ = 1408207976. Its totient is φ = 704103984.

The previous prime is 1056155953. The next prime is 1056155987. The reversal of 1056155979 is 9795516501.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1056155979 - 2⁷ = 1056155851 is a prime.

It is a super-2 number, since 2×1056155979² = 2230930903954896882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056155939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176025994 + ... + 176025999.

It is an arithmetic number, because the mean of its divisors is an integer number (352051994).

Almost surely, 2^1056155979 is an apocalyptic number.

1056155979 is a deficient number, since it is larger than the sum of its proper divisors (352051997).

1056155979 is an equidigital number, since it uses as much as digits as its factorization.

1056155979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352051996.

The product of its (nonzero) digits is 425250, while the sum is 48.

The square root of 1056155979 is about 32498.5534908863. The cubic root of 1056155979 is about 1018.3788096858.

The spelling of 1056155979 in words is "one billion, fifty-six million, one hundred fifty-five thousand, nine hundred seventy-nine".