90831697 has 8 divisors (see below), whose sum is σ = 104918112. Its totient is φ = 77716800.

The previous prime is 90831679. The next prime is 90831721. The reversal of 90831697 is 79613809.

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 90831697 - 2⁷ = 90831569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90831607) 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, 242679 + ... + 243052.

It is an arithmetic number, because the mean of its divisors is an integer number (13114764).

Almost surely, 2^90831697 is an apocalyptic number.

It is an amenable number.

90831697 is a deficient number, since it is larger than the sum of its proper divisors (14086415).

90831697 is a wasteful number, since it uses less digits than its factorization.

90831697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485759.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 90831697 is about 9530.5664574568. The cubic root of 90831697 is about 449.5166777817.

The spelling of 90831697 in words is "ninety million, eight hundred thirty-one thousand, six hundred ninety-seven".