91626401 has 4 divisors (see below), whose sum is σ = 91648704. Its totient is φ = 91604100.

The previous prime is 91626397. The next prime is 91626407. The reversal of 91626401 is 10462619.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10462619 = 2273 ⋅4603.

It is a cyclic number.

It is not a de Polignac number, because 91626401 - 2² = 91626397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91626407) 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, 3005 + ... + 13866.

It is an arithmetic number, because the mean of its divisors is an integer number (22912176).

Almost surely, 2^91626401 is an apocalyptic number.

It is an amenable number.

91626401 is a deficient number, since it is larger than the sum of its proper divisors (22303).

91626401 is a wasteful number, since it uses less digits than its factorization.

91626401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22302.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 91626401 is about 9572.1680407314. The cubic root of 91626401 is about 450.8238422620.

The spelling of 91626401 in words is "ninety-one million, six hundred twenty-six thousand, four hundred one".