91164769 has 4 divisors (see below), whose sum is σ = 94105600. Its totient is φ = 88223940.

The previous prime is 91164767. The next prime is 91164779. The reversal of 91164769 is 96746119.

It is a happy number.

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 91164769 - 2¹ = 91164767 is a prime.

It is a super-2 number, since 2×91164769² = 16622030213646722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91164767) 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, 1470369 + ... + 1470430.

It is an arithmetic number, because the mean of its divisors is an integer number (23526400).

Almost surely, 2^91164769 is an apocalyptic number.

It is an amenable number.

91164769 is a deficient number, since it is larger than the sum of its proper divisors (2940831).

91164769 is a wasteful number, since it uses less digits than its factorization.

91164769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940830.

The product of its digits is 81648, while the sum is 43.

The square root of 91164769 is about 9548.0243506183. The cubic root of 91164769 is about 450.0654538536.

The spelling of 91164769 in words is "ninety-one million, one hundred sixty-four thousand, seven hundred sixty-nine".