90684693 has 24 divisors (see below), whose sum is σ = 143279136. Its totient is φ = 54813600.

The previous prime is 90684691. The next prime is 90684709. The reversal of 90684693 is 39648609.

It is not a de Polignac number, because 90684693 - 2¹ = 90684691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90684691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44646 + ... + 46632.

It is an arithmetic number, because the mean of its divisors is an integer number (5969964).

Almost surely, 2^90684693 is an apocalyptic number.

It is an amenable number.

90684693 is a deficient number, since it is larger than the sum of its proper divisors (52594443).

90684693 is a wasteful number, since it uses less digits than its factorization.

90684693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465 (or 2462 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 90684693 is about 9522.8510961791. The cubic root of 90684693 is about 449.2740443075.

The spelling of 90684693 in words is "ninety million, six hundred eighty-four thousand, six hundred ninety-three".