91264523 has 4 divisors (see below), whose sum is σ = 104302320. Its totient is φ = 78226728.

The previous prime is 91264507. The next prime is 91264541. The reversal of 91264523 is 32546219.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91264523 - 2⁴ = 91264507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91264523.

It is not an unprimeable number, because it can be changed into a prime (91264573) 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, 6518888 + ... + 6518901.

It is an arithmetic number, because the mean of its divisors is an integer number (26075580).

Almost surely, 2^91264523 is an apocalyptic number.

91264523 is a deficient number, since it is larger than the sum of its proper divisors (13037797).

91264523 is a wasteful number, since it uses less digits than its factorization.

91264523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13037796.

The product of its digits is 12960, while the sum is 32.

The square root of 91264523 is about 9553.2467255902. The cubic root of 91264523 is about 450.2295503734.

It can be divided in two parts, 912 and 64523, that multiplied together give a triangular number (58844976 = T₁₀₈₄₈).

The spelling of 91264523 in words is "ninety-one million, two hundred sixty-four thousand, five hundred twenty-three".