91899606 has 8 divisors (see below), whose sum is σ = 183799224. Its totient is φ = 30633200.

The previous prime is 91899583. The next prime is 91899607. The reversal of 91899606 is 60699819.

It is a sphenic number, since it is the product of 3 distinct primes.

91899606 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91899607) 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, 7658295 + ... + 7658306.

It is an arithmetic number, because the mean of its divisors is an integer number (22974903).

Almost surely, 2^91899606 is an apocalyptic number.

91899606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91899606 is a wasteful number, since it uses less digits than its factorization.

91899606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15316606.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 91899606 is about 9586.4282191023. The cubic root of 91899606 is about 451.2714756650.

The spelling of 91899606 in words is "ninety-one million, eight hundred ninety-nine thousand, six hundred six".