91370401 has 4 divisors (see below), whose sum is σ = 91402900. Its totient is φ = 91337904.

The previous prime is 91370381. The next prime is 91370407. The reversal of 91370401 is 10407319.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20793600 + 70576801 = 4560^2 + 8401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91370401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91370407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11586 + ... + 17803.

It is an arithmetic number, because the mean of its divisors is an integer number (22850725).

Almost surely, 2^91370401 is an apocalyptic number.

It is an amenable number.

91370401 is a deficient number, since it is larger than the sum of its proper divisors (32499).

91370401 is a wasteful number, since it uses less digits than its factorization.

91370401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32498.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 91370401 is about 9558.7865861730. The cubic root of 91370401 is about 450.4035901884.

The spelling of 91370401 in words is "ninety-one million, three hundred seventy thousand, four hundred one".