91839285 has 16 divisors (see below), whose sum is σ = 163270080. Its totient is φ = 48980880.

The previous prime is 91839283. The next prime is 91839361. The reversal of 91839285 is 58293819.

It is a happy number.

It is not a de Polignac number, because 91839285 - 2¹ = 91839283 is a prime.

It is a super-2 number, since 2×91839285² = 16868908538622450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 91839285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91839283) 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, 340011 + ... + 340280.

It is an arithmetic number, because the mean of its divisors is an integer number (10204380).

Almost surely, 2^91839285 is an apocalyptic number.

It is an amenable number.

91839285 is a deficient number, since it is larger than the sum of its proper divisors (71430795).

91839285 is a wasteful number, since it uses less digits than its factorization.

91839285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680305 (or 680299 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 91839285 is about 9583.2815360919. The cubic root of 91839285 is about 451.1727189679.

The spelling of 91839285 in words is "ninety-one million, eight hundred thirty-nine thousand, two hundred eighty-five".