91371472 has 20 divisors (see below), whose sum is σ = 179459620. Its totient is φ = 45059328.

The previous prime is 91371439. The next prime is 91371491. The reversal of 91371472 is 27417319.

It can be written as a sum of positive squares in 2 ways, for example, as 60279696 + 31091776 = 7764^2 + 5576^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37947 + ... + 40282.

It is an arithmetic number, because the mean of its divisors is an integer number (8972981).

Almost surely, 2^91371472 is an apocalyptic number.

It is an amenable number.

91371472 is a deficient number, since it is larger than the sum of its proper divisors (88088148).

91371472 is a wasteful number, since it uses less digits than its factorization.

91371472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78310 (or 78304 counting only the distinct ones).

The product of its digits is 10584, while the sum is 34.

The square root of 91371472 is about 9558.8426077638. The cubic root of 91371472 is about 450.4053499865.

It can be divided in two parts, 9137 and 1472, that added together give a square (10609 = 103²).

The spelling of 91371472 in words is "ninety-one million, three hundred seventy-one thousand, four hundred seventy-two".