91499648 has 16 divisors (see below), whose sum is σ = 182284710. Its totient is φ = 45749760.

The previous prime is 91499641. The next prime is 91499699. The reversal of 91499648 is 84699419.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 74787904 + 16711744 = 8648^2 + 4088^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 91499596 and 91499605.

It is not an unprimeable number, because it can be changed into a prime (91499641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357293 + ... + 357548.

Almost surely, 2^91499648 is an apocalyptic number.

It is an amenable number.

91499648 is a deficient number, since it is larger than the sum of its proper divisors (90785062).

91499648 is an equidigital number, since it uses as much as digits as its factorization.

91499648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714855 (or 714843 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 91499648 is about 9565.5448355021. The cubic root of 91499648 is about 450.6158612864.

The spelling of 91499648 in words is "ninety-one million, four hundred ninety-nine thousand, six hundred forty-eight".