91899275 has 12 divisors (see below), whose sum is σ = 122721312. Its totient is φ = 67863840.

The previous prime is 91899271. The next prime is 91899281. The reversal of 91899275 is 57299819.

It is a happy number.

It is not a de Polignac number, because 91899275 - 2² = 91899271 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 141059 + ... + 141708.

It is an arithmetic number, because the mean of its divisors is an integer number (10226776).

Almost surely, 2^91899275 is an apocalyptic number.

91899275 is a deficient number, since it is larger than the sum of its proper divisors (30822037).

91899275 is a wasteful number, since it uses less digits than its factorization.

91899275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282790 (or 282785 counting only the distinct ones).

The product of its digits is 408240, while the sum is 50.

The square root of 91899275 is about 9586.4109550968. The cubic root of 91899275 is about 451.2709338743.

The spelling of 91899275 in words is "ninety-one million, eight hundred ninety-nine thousand, two hundred seventy-five".