91520735 has 4 divisors (see below), whose sum is σ = 109824888. Its totient is φ = 73216584.

The previous prime is 91520683. The next prime is 91520743. The reversal of 91520735 is 53702519.

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 91520735 - 2⁸ = 91520479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9152069 + ... + 9152078.

It is an arithmetic number, because the mean of its divisors is an integer number (27456222).

Almost surely, 2^91520735 is an apocalyptic number.

91520735 is a deficient number, since it is larger than the sum of its proper divisors (18304153).

91520735 is a wasteful number, since it uses less digits than its factorization.

91520735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18304152.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 91520735 is about 9566.6470092713. The cubic root of 91520735 is about 450.6504749234.

The spelling of 91520735 in words is "ninety-one million, five hundred twenty thousand, seven hundred thirty-five".