90706231 has 8 divisors (see below), whose sum is σ = 113088384. Its totient is φ = 70680120.

The previous prime is 90706211. The next prime is 90706243. The reversal of 90706231 is 13260709.

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

It is not a de Polignac number, because 90706231 - 2⁵ = 90706199 is a prime.

It is a super-2 number, since 2×90706231² = 16455240684450722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90706231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90706211) 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, 588925 + ... + 589078.

It is an arithmetic number, because the mean of its divisors is an integer number (14136048).

Almost surely, 2^90706231 is an apocalyptic number.

90706231 is a deficient number, since it is larger than the sum of its proper divisors (22382153).

90706231 is a wasteful number, since it uses less digits than its factorization.

90706231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178021.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 90706231 is about 9523.9818878450. The cubic root of 90706231 is about 449.3096096570.

The spelling of 90706231 in words is "ninety million, seven hundred six thousand, two hundred thirty-one".