91469540 has 24 divisors (see below), whose sum is σ = 192265920. Its totient is φ = 36553568.

The previous prime is 91469531. The next prime is 91469549. The reversal of 91469540 is 4596419.

It is an interprime number because it is at equal distance from previous prime (91469531) and next prime (91469549).

It is a junction number, because it is equal to n+sod(n) for n = 91469494 and 91469503.

It is not an unprimeable number, because it can be changed into a prime (91469549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39659 + ... + 41901.

It is an arithmetic number, because the mean of its divisors is an integer number (8011080).

Almost surely, 2^91469540 is an apocalyptic number.

It is an amenable number.

91469540 is an abundant number, since it is smaller than the sum of its proper divisors (100796380).

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

91469540 is a wasteful number, since it uses less digits than its factorization.

91469540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4291 (or 4289 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 91469540 is about 9563.9709326200. The cubic root of 91469540 is about 450.5664307476.

The spelling of 91469540 in words is "ninety-one million, four hundred sixty-nine thousand, five hundred forty".