161134691 has 2 divisors, whose sum is σ = 161134692. Its totient is φ = 161134690.

The previous prime is 161134669. The next prime is 161134697. The reversal of 161134691 is 196431161.

161134691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161134691 - 2⁶ = 161134627 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161134697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80567345 + 80567346.

It is an arithmetic number, because the mean of its divisors is an integer number (80567346).

Almost surely, 2^161134691 is an apocalyptic number.

161134691 is a deficient number, since it is larger than the sum of its proper divisors (1).

161134691 is an equidigital number, since it uses as much as digits as its factorization.

161134691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 161134691 is about 12693.8839997851. The cubic root of 161134691 is about 544.1638453180.

The spelling of 161134691 in words is "one hundred sixty-one million, one hundred thirty-four thousand, six hundred ninety-one".