1057605817 has 4 divisors (see below), whose sum is σ = 1086189796. Its totient is φ = 1029021840.

The previous prime is 1057605793. The next prime is 1057605833. The reversal of 1057605817 is 7185067501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7185067501 = 31 ⋅231776371.

It can be written as a sum of positive squares in 2 ways, for example, as 1024704121 + 32901696 = 32011^2 + 5736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1057605817 - 2¹¹ = 1057603769 is a prime.

It is a super-2 number, since 2×1057605817² = 2237060128304474978, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1057605817.

It is not an unprimeable number, because it can be changed into a prime (1057605877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14291934 + ... + 14292007.

It is an arithmetic number, because the mean of its divisors is an integer number (271547449).

Almost surely, 2^1057605817 is an apocalyptic number.

It is an amenable number.

1057605817 is a deficient number, since it is larger than the sum of its proper divisors (28583979).

1057605817 is an equidigital number, since it uses as much as digits as its factorization.

1057605817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28583978.

The product of its (nonzero) digits is 58800, while the sum is 40.

The square root of 1057605817 is about 32520.8520337337. The cubic root of 1057605817 is about 1018.8445897493.

The spelling of 1057605817 in words is "one billion, fifty-seven million, six hundred five thousand, eight hundred seventeen".