91038401 has 4 divisors (see below), whose sum is σ = 92320704. Its totient is φ = 89756100.

The previous prime is 91038397. The next prime is 91038407. The reversal of 91038401 is 10483019.

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 91038401 - 2² = 91038397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91038407) 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, 641045 + ... + 641186.

It is an arithmetic number, because the mean of its divisors is an integer number (23080176).

Almost surely, 2^91038401 is an apocalyptic number.

It is an amenable number.

91038401 is a deficient number, since it is larger than the sum of its proper divisors (1282303).

91038401 is a wasteful number, since it uses less digits than its factorization.

91038401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282302.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 91038401 is about 9541.4045611744. The cubic root of 91038401 is about 449.8574050254.

The spelling of 91038401 in words is "ninety-one million, thirty-eight thousand, four hundred one".