1161105731 has 2 divisors, whose sum is σ = 1161105732. Its totient is φ = 1161105730.

The previous prime is 1161105727. The next prime is 1161105767. The reversal of 1161105731 is 1375011611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161105731 - 2² = 1161105727 is a prime.

It is a super-2 number, since 2×1161105731² = 2696333037122088722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1161105731.

It is not a weakly prime, because it can be changed into another prime (1161105721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580552865 + 580552866.

It is an arithmetic number, because the mean of its divisors is an integer number (580552866).

Almost surely, 2^1161105731 is an apocalyptic number.

1161105731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161105731 is an equidigital number, since it uses as much as digits as its factorization.

1161105731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 1161105731 is about 34075.0015553925. The cubic root of 1161105731 is about 1051.0513222105.

The spelling of 1161105731 in words is "one billion, one hundred sixty-one million, one hundred five thousand, seven hundred thirty-one".