91902481 has 16 divisors (see below), whose sum is σ = 103074048. Its totient is φ = 81219600.

The previous prime is 91902467. The next prime is 91902511. The reversal of 91902481 is 18420919.

It is not a de Polignac number, because 91902481 - 2¹⁹ = 91378193 is a prime.

It is a super-2 number, since 2×91902481² = 16892132027910722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91902451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156270 + ... + 156856.

It is an arithmetic number, because the mean of its divisors is an integer number (6442128).

Almost surely, 2^91902481 is an apocalyptic number.

It is an amenable number.

91902481 is a deficient number, since it is larger than the sum of its proper divisors (11171567).

91902481 is a wasteful number, since it uses less digits than its factorization.

91902481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 91902481 is about 9586.5781695034. The cubic root of 91902481 is about 451.2761814957.

The spelling of 91902481 in words is "ninety-one million, nine hundred two thousand, four hundred eighty-one".