91470772 has 12 divisors (see below), whose sum is σ = 160529796. Its totient is φ = 45605120.

The previous prime is 91470767. The next prime is 91470787. The reversal of 91470772 is 27707419.

It can be written as a sum of positive squares in 2 ways, for example, as 36917776 + 54552996 = 6076^2 + 7386^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30979 + ... + 33802.

It is an arithmetic number, because the mean of its divisors is an integer number (13377483).

Almost surely, 2^91470772 is an apocalyptic number.

It is an amenable number.

91470772 is a deficient number, since it is larger than the sum of its proper divisors (69059024).

91470772 is a wasteful number, since it uses less digits than its factorization.

91470772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65138 (or 65136 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 91470772 is about 9564.0353407963. The cubic root of 91470772 is about 450.5684536263.

The spelling of 91470772 in words is "ninety-one million, four hundred seventy thousand, seven hundred seventy-two".