1059697809 has 15 divisors (see below), whose sum is σ = 1583443147. Its totient is φ = 706269888.

The previous prime is 1059697801. The next prime is 1059697819. The reversal of 1059697809 is 9087969501.

The square root of 1059697809 is 32553.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5267025 + 1054430784 = 2295^2 + 32472^2 .

It is not a de Polignac number, because 1059697809 - 2³ = 1059697801 is a prime.

It is a super-2 number, since 2×1059697809² = 2245918892798800962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1059697801) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 291169 + ... + 294785.

Almost surely, 2^1059697809 is an apocalyptic number.

1059697809 is the 32553-rd square number.

1059697809 is the 16277-th centered octagonal number.

It is an amenable number.

1059697809 is a deficient number, since it is larger than the sum of its proper divisors (523745338).

1059697809 is an frugal number, since it uses more digits than its factorization.

1059697809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7246 (or 3620 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The cubic root of 1059697809 is about 1019.5159208175.

The spelling of 1059697809 in words is "one billion, fifty-nine million, six hundred ninety-seven thousand, eight hundred nine".