90432831 has 8 divisors (see below), whose sum is σ = 121683760. Its totient is φ = 59735232.

The previous prime is 90432767. The next prime is 90432833. The reversal of 90432831 is 13823409.

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

It is not a de Polignac number, because 90432831 - 2⁶ = 90432767 is a prime.

It is a super-2 number, since 2×90432831² = 16356193845349122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90432833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137950 + ... + 138603.

It is an arithmetic number, because the mean of its divisors is an integer number (15210470).

Almost surely, 2^90432831 is an apocalyptic number.

90432831 is a deficient number, since it is larger than the sum of its proper divisors (31250929).

90432831 is a wasteful number, since it uses less digits than its factorization.

90432831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276665.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 90432831 is about 9509.6178156643. The cubic root of 90432831 is about 448.8577301016.

The spelling of 90432831 in words is "ninety million, four hundred thirty-two thousand, eight hundred thirty-one".