1056987331 has 8 divisors (see below), whose sum is σ = 1096596720. Its totient is φ = 1017588768.

The previous prime is 1056987319. The next prime is 1056987353. The reversal of 1056987331 is 1337896501.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1056987331 is a prime.

It is a super-2 number, since 2×1056987331² = 2234444435789007122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1056987311) 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 7 ways as a sum of consecutive naturals, for example, 42456 + ... + 62581.

It is an arithmetic number, because the mean of its divisors is an integer number (137074590).

Almost surely, 2^1056987331 is an apocalyptic number.

1056987331 is a deficient number, since it is larger than the sum of its proper divisors (39609389).

1056987331 is a wasteful number, since it uses less digits than its factorization.

1056987331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105413.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1056987331 is about 32511.3415749027. The cubic root of 1056987331 is about 1018.6459448541.

The spelling of 1056987331 in words is "one billion, fifty-six million, nine hundred eighty-seven thousand, three hundred thirty-one".