91848609 has 6 divisors (see below), whose sum is σ = 132670226. Its totient is φ = 61232400.

The previous prime is 91848599. The next prime is 91848643. The reversal of 91848609 is 90684819.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 20277009 = 8460^2 + 4503^2 .

It is not a de Polignac number, because 91848609 - 2⁴ = 91848593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91844609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5102692 + ... + 5102709.

Almost surely, 2^91848609 is an apocalyptic number.

It is an amenable number.

91848609 is a deficient number, since it is larger than the sum of its proper divisors (40821617).

91848609 is a wasteful number, since it uses less digits than its factorization.

91848609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10205407 (or 10205404 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 91848609 is about 9583.7679959398. The cubic root of 91848609 is about 451.1879869151.

The spelling of 91848609 in words is "ninety-one million, eight hundred forty-eight thousand, six hundred nine".