1165697801 has 2 divisors, whose sum is σ = 1165697802. Its totient is φ = 1165697800.

The previous prime is 1165697789. The next prime is 1165697831. The reversal of 1165697801 is 1087965611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1159062025 + 6635776 = 34045^2 + 2576^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165697801 - 2³⁰ = 91955977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1165697831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582848900 + 582848901.

It is an arithmetic number, because the mean of its divisors is an integer number (582848901).

Almost surely, 2^1165697801 is an apocalyptic number.

It is an amenable number.

1165697801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165697801 is an equidigital number, since it uses as much as digits as its factorization.

1165697801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 1165697801 is about 34142.3168663171. The cubic root of 1165697801 is about 1052.4351044292.

The spelling of 1165697801 in words is "one billion, one hundred sixty-five million, six hundred ninety-seven thousand, eight hundred one".