91926321 has 4 divisors (see below), whose sum is σ = 122568432. Its totient is φ = 61284212.

The previous prime is 91926311. The next prime is 91926323. The reversal of 91926321 is 12362919.

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 91926321 - 2¹³ = 91918129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91926323) 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, 15321051 + ... + 15321056.

It is an arithmetic number, because the mean of its divisors is an integer number (30642108).

Almost surely, 2^91926321 is an apocalyptic number.

It is an amenable number.

91926321 is a deficient number, since it is larger than the sum of its proper divisors (30642111).

91926321 is a wasteful number, since it uses less digits than its factorization.

91926321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30642110.

The product of its digits is 5832, while the sum is 33.

The square root of 91926321 is about 9587.8214939578. The cubic root of 91926321 is about 451.3151992818.

The spelling of 91926321 in words is "ninety-one million, nine hundred twenty-six thousand, three hundred twenty-one".