91235161 has 4 divisors (see below), whose sum is σ = 91713024. Its totient is φ = 90757300.

The previous prime is 91235147. The next prime is 91235197. The reversal of 91235161 is 16153219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91235161 - 2¹³ = 91226969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91235461) 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, 238645 + ... + 239026.

It is an arithmetic number, because the mean of its divisors is an integer number (22928256).

Almost surely, 2^91235161 is an apocalyptic number.

It is an amenable number.

91235161 is a deficient number, since it is larger than the sum of its proper divisors (477863).

91235161 is a wasteful number, since it uses less digits than its factorization.

91235161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477862.

The product of its digits is 1620, while the sum is 28.

The square root of 91235161 is about 9551.7098469332. The cubic root of 91235161 is about 450.1812619565.

The spelling of 91235161 in words is "ninety-one million, two hundred thirty-five thousand, one hundred sixty-one".