91427572 has 12 divisors (see below), whose sum is σ = 160104420. Its totient is φ = 45683456.

The previous prime is 91427551. The next prime is 91427573. The reversal of 91427572 is 27572419.

It can be written as a sum of positive squares in 2 ways, for example, as 76108176 + 15319396 = 8724^2 + 3914^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91427573) 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, 54 + ... + 13522.

It is an arithmetic number, because the mean of its divisors is an integer number (13342035).

Almost surely, 2^91427572 is an apocalyptic number.

It is an amenable number.

91427572 is a deficient number, since it is larger than the sum of its proper divisors (68676848).

91427572 is a wasteful number, since it uses less digits than its factorization.

91427572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15170 (or 15168 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 91427572 is about 9561.7766131614. The cubic root of 91427572 is about 450.4975106652.

The spelling of 91427572 in words is "ninety-one million, four hundred twenty-seven thousand, five hundred seventy-two".