1057056691 has 2 divisors, whose sum is σ = 1057056692. Its totient is φ = 1057056690.

The previous prime is 1057056683. The next prime is 1057056703. The reversal of 1057056691 is 1966507501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1057056691 - 2³ = 1057056683 is a prime.

It is a super-2 number, since 2×1057056691² = 2234737695975738962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1057056391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528528345 + 528528346.

It is an arithmetic number, because the mean of its divisors is an integer number (528528346).

Almost surely, 2^1057056691 is an apocalyptic number.

1057056691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1057056691 is an equidigital number, since it uses as much as digits as its factorization.

1057056691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 1057056691 is about 32512.4082620774. The cubic root of 1057056691 is about 1018.6682257069.

The spelling of 1057056691 in words is "one billion, fifty-seven million, fifty-six thousand, six hundred ninety-one".