91047426 has 32 divisors (see below), whose sum is σ = 187038720. Its totient is φ = 29530704.

The previous prime is 91047391. The next prime is 91047433. The reversal of 91047426 is 62474019.

91047426 = 279² + 280² + ... + 665².

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92131 + ... + 93113.

It is an arithmetic number, because the mean of its divisors is an integer number (5844960).

Almost surely, 2^91047426 is an apocalyptic number.

91047426 is an abundant number, since it is smaller than the sum of its proper divisors (95991294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91047426 is a wasteful number, since it uses less digits than its factorization.

91047426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 91047426 is about 9541.8774882095. The cubic root of 91047426 is about 449.8722699208.

The spelling of 91047426 in words is "ninety-one million, forty-seven thousand, four hundred twenty-six".