1056387817 has 2 divisors, whose sum is σ = 1056387818. Its totient is φ = 1056387816.

The previous prime is 1056387811. The next prime is 1056387823. The reversal of 1056387817 is 7187836501.

It is a balanced prime because it is at equal distance from previous prime (1056387811) and next prime (1056387823).

It can be written as a sum of positive squares in only one way, i.e., 725548096 + 330839721 = 26936^2 + 18189^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056387817 - 2³ = 1056387809 is a prime.

It is a super-2 number, since 2×1056387817² = 2231910439812050978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1056387811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528193908 + 528193909.

It is an arithmetic number, because the mean of its divisors is an integer number (528193909).

Almost surely, 2^1056387817 is an apocalyptic number.

It is an amenable number.

1056387817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056387817 is an equidigital number, since it uses as much as digits as its factorization.

1056387817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 1056387817 is about 32502.1201923813. The cubic root of 1056387817 is about 1018.4533193977.

The spelling of 1056387817 in words is "one billion, fifty-six million, three hundred eighty-seven thousand, eight hundred seventeen".