90993790 has 8 divisors (see below), whose sum is σ = 163788840. Its totient is φ = 36397512.

The previous prime is 90993781. The next prime is 90993803. The reversal of 90993790 is 9739909.

90993790 = 4264² + 4265² + ... + 4268².

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

It is a self number, because there is not a number n which added to its sum of digits gives 90993790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4549680 + ... + 4549699.

It is an arithmetic number, because the mean of its divisors is an integer number (20473605).

Almost surely, 2^90993790 is an apocalyptic number.

90993790 is a deficient number, since it is larger than the sum of its proper divisors (72795050).

90993790 is a wasteful number, since it uses less digits than its factorization.

90993790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9099386.

The product of its (nonzero) digits is 137781, while the sum is 46.

The square root of 90993790 is about 9539.0665161744. The cubic root of 90993790 is about 449.7839127137.

The spelling of 90993790 in words is "ninety million, nine hundred ninety-three thousand, seven hundred ninety".