91032123 has 16 divisors (see below), whose sum is σ = 149386496. Its totient is φ = 48016800.

The previous prime is 91032107. The next prime is 91032133. The reversal of 91032123 is 32123019.

It is a happy number.

It is not a de Polignac number, because 91032123 - 2⁴ = 91032107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 91032123.

It is not an unprimeable number, because it can be changed into a prime (91032133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166453 + ... + 166998.

It is an arithmetic number, because the mean of its divisors is an integer number (9336656).

Almost surely, 2^91032123 is an apocalyptic number.

91032123 is a deficient number, since it is larger than the sum of its proper divisors (58354373).

91032123 is a wasteful number, since it uses less digits than its factorization.

91032123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333474.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 91032123 is about 9541.0755682994. The cubic root of 91032123 is about 449.8470640788.

It can be divided in two parts, 910 and 32123, that added together give a palindrome (33033).

The spelling of 91032123 in words is "ninety-one million, thirty-two thousand, one hundred twenty-three".