91899272 has 16 divisors (see below), whose sum is σ = 172435740. Its totient is φ = 45916416.

The previous prime is 91899271. The next prime is 91899281. The reversal of 91899272 is 27299819.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78605956 + 13293316 = 8866^2 + 3646^2 .

It is not an unprimeable number, because it can be changed into a prime (91899271) 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, 10748 + ... + 17300.

Almost surely, 2^91899272 is an apocalyptic number.

It is an amenable number.

91899272 is a deficient number, since it is larger than the sum of its proper divisors (80536468).

91899272 is a wasteful number, since it uses less digits than its factorization.

91899272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8312 (or 8308 counting only the distinct ones).

The product of its digits is 163296, while the sum is 47.

The square root of 91899272 is about 9586.4107986253. The cubic root of 91899272 is about 451.2709289638.

The spelling of 91899272 in words is "ninety-one million, eight hundred ninety-nine thousand, two hundred seventy-two".