91283389 has 8 divisors (see below), whose sum is σ = 96815232. Its totient is φ = 85881840.

The previous prime is 91283383. The next prime is 91283399. The reversal of 91283389 is 98338219.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91283389 - 2²³ = 82894781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91283383) 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, 31129 + ... + 33934.

It is an arithmetic number, because the mean of its divisors is an integer number (12101904).

Almost surely, 2^91283389 is an apocalyptic number.

It is an amenable number.

91283389 is a deficient number, since it is larger than the sum of its proper divisors (5531843).

91283389 is a wasteful number, since it uses less digits than its factorization.

91283389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65147.

The product of its digits is 93312, while the sum is 43.

The square root of 91283389 is about 9554.2340875656. The cubic root of 91283389 is about 450.2605717210.

The spelling of 91283389 in words is "ninety-one million, two hundred eighty-three thousand, three hundred eighty-nine".