91395272 has 16 divisors (see below), whose sum is σ = 171660300. Its totient is φ = 45619200.

The previous prime is 91395229. The next prime is 91395277. The reversal of 91395272 is 27259319.

It can be written as a sum of positive squares in 2 ways, for example, as 79103236 + 12292036 = 8894^2 + 3506^2 .

It is not an unprimeable number, because it can be changed into a prime (91395277) 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, 4697 + ... + 14312.

Almost surely, 2^91395272 is an apocalyptic number.

It is an amenable number.

91395272 is a deficient number, since it is larger than the sum of its proper divisors (80265028).

91395272 is a wasteful number, since it uses less digits than its factorization.

91395272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19616 (or 19612 counting only the distinct ones).

The product of its digits is 34020, while the sum is 38.

The square root of 91395272 is about 9560.0874472988. The cubic root of 91395272 is about 450.4444530621. Note that the first 4 decimals are identical.

It can be divided in two parts, 913952 and 72, that multiplied together give a square (65804544 = 8112²).

The spelling of 91395272 in words is "ninety-one million, three hundred ninety-five thousand, two hundred seventy-two".