91998465 has 64 divisors (see below), whose sum is σ = 167311872. Its totient is φ = 42854400.

The previous prime is 91998461. The next prime is 91998479. The reversal of 91998465 is 56489919.

It is not a de Polignac number, because 91998465 - 2² = 91998461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91998461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 295660 + ... + 295970.

It is an arithmetic number, because the mean of its divisors is an integer number (2614248).

Almost surely, 2^91998465 is an apocalyptic number.

It is an amenable number.

91998465 is a deficient number, since it is larger than the sum of its proper divisors (75313407).

91998465 is a wasteful number, since it uses less digits than its factorization.

91998465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410.

The product of its digits is 699840, while the sum is 51.

The square root of 91998465 is about 9591.5830288853. The cubic root of 91998465 is about 451.4332328310.

The spelling of 91998465 in words is "ninety-one million, nine hundred ninety-eight thousand, four hundred sixty-five".