91199698 has 4 divisors (see below), whose sum is σ = 136799550. Its totient is φ = 45599848.

The previous prime is 91199683. The next prime is 91199723. The reversal of 91199698 is 89699119.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 86434209 + 4765489 = 9297^2 + 2183^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22799923 + ... + 22799926.

Almost surely, 2^91199698 is an apocalyptic number.

91199698 is a deficient number, since it is larger than the sum of its proper divisors (45599852).

91199698 is a wasteful number, since it uses less digits than its factorization.

91199698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45599851.

The product of its digits is 314928, while the sum is 52.

The square root of 91199698 is about 9549.8532973025. The cubic root of 91199698 is about 450.1229260881.

The spelling of 91199698 in words is "ninety-one million, one hundred ninety-nine thousand, six hundred ninety-eight".