90849993 has 8 divisors (see below), whose sum is σ = 130451328. Its totient is φ = 55907664.

The previous prime is 90849971. The next prime is 90850007. The reversal of 90849993 is 39994809.

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

It is not a de Polignac number, because 90849993 - 2⁵ = 90849961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90849593) 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, 1164705 + ... + 1164782.

It is an arithmetic number, because the mean of its divisors is an integer number (16306416).

Almost surely, 2^90849993 is an apocalyptic number.

It is an amenable number.

90849993 is a deficient number, since it is larger than the sum of its proper divisors (39601335).

90849993 is a wasteful number, since it uses less digits than its factorization.

90849993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329503.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 90849993 is about 9531.5262681273. The cubic root of 90849993 is about 449.5468574263.

The spelling of 90849993 in words is "ninety million, eight hundred forty-nine thousand, nine hundred ninety-three".