91899794 has 24 divisors (see below), whose sum is σ = 162995148. Its totient is φ = 38737440.

The previous prime is 91899781. The next prime is 91899803. The reversal of 91899794 is 49799819.

It can be written as a sum of positive squares in 2 ways, for example, as 59830225 + 32069569 = 7735^2 + 5663^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1709 + ... + 13664.

Almost surely, 2^91899794 is an apocalyptic number.

91899794 is a deficient number, since it is larger than the sum of its proper divisors (71095354).

91899794 is a wasteful number, since it uses less digits than its factorization.

91899794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15450 (or 15443 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 56.

The square root of 91899794 is about 9586.4380246262. The cubic root of 91899794 is about 451.2717833884.

The spelling of 91899794 in words is "ninety-one million, eight hundred ninety-nine thousand, seven hundred ninety-four".