906990431 has 8 divisors (see below), whose sum is σ = 928952064. Its totient is φ = 885208480.

The previous prime is 906990419. The next prime is 906990437. The reversal of 906990431 is 134099609.

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

It is a cyclic number.

It is not a de Polignac number, because 906990431 - 2¹⁰ = 906989407 is a prime.

It is a super-2 number, since 2×906990431² = 1645263283851131522, 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 (906990437) 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, 34676 + ... + 54921.

It is an arithmetic number, because the mean of its divisors is an integer number (116119008).

Almost surely, 2^906990431 is an apocalyptic number.

906990431 is a deficient number, since it is larger than the sum of its proper divisors (21961633).

906990431 is a wasteful number, since it uses less digits than its factorization.

906990431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89841.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 906990431 is about 30116.2818256172. The cubic root of 906990431 is about 967.9826394076.

The spelling of 906990431 in words is "nine hundred six million, nine hundred ninety thousand, four hundred thirty-one".