91400422 has 4 divisors (see below), whose sum is σ = 137100636. Its totient is φ = 45700210.

The previous prime is 91400417. The next prime is 91400447. The reversal of 91400422 is 22400419.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 91400393 and 91400402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22850104 + ... + 22850107.

It is an arithmetic number, because the mean of its divisors is an integer number (34275159).

Almost surely, 2^91400422 is an apocalyptic number.

91400422 is a deficient number, since it is larger than the sum of its proper divisors (45700214).

91400422 is a wasteful number, since it uses less digits than its factorization.

91400422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45700213.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 91400422 is about 9560.3567925052. The cubic root of 91400422 is about 450.4529135484.

The spelling of 91400422 in words is "ninety-one million, four hundred thousand, four hundred twenty-two".