91732079 has 4 divisors (see below), whose sum is σ = 93286920. Its totient is φ = 90177240.

The previous prime is 91732061. The next prime is 91732087. The reversal of 91732079 is 97023719.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97023719 = 13 ⋅7463363.

It is a cyclic number.

It is not a de Polignac number, because 91732079 - 2¹² = 91727983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91732009) 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, 777332 + ... + 777449.

It is an arithmetic number, because the mean of its divisors is an integer number (23321730).

Almost surely, 2^91732079 is an apocalyptic number.

91732079 is a deficient number, since it is larger than the sum of its proper divisors (1554841).

91732079 is a wasteful number, since it uses less digits than its factorization.

91732079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554840.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 91732079 is about 9577.6865160643. The cubic root of 91732079 is about 450.9970960297.

The spelling of 91732079 in words is "ninety-one million, seven hundred thirty-two thousand, seventy-nine".