1056727391 has 2 divisors, whose sum is σ = 1056727392. Its totient is φ = 1056727390.

The previous prime is 1056727381. The next prime is 1056727393. The reversal of 1056727391 is 1937276501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1056727391 - 2²⁶ = 989618527 is a prime.

It is a super-2 number, since 2×1056727391² = 2233345557779333762, which contains 22 as substring.

Together with 1056727393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056727393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528363695 + 528363696.

It is an arithmetic number, because the mean of its divisors is an integer number (528363696).

Almost surely, 2^1056727391 is an apocalyptic number.

1056727391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056727391 is an equidigital number, since it uses as much as digits as its factorization.

1056727391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 1056727391 is about 32507.3436472438. The cubic root of 1056727391 is about 1018.5624343812.

The spelling of 1056727391 in words is "one billion, fifty-six million, seven hundred twenty-seven thousand, three hundred ninety-one".