909431 has 4 divisors (see below), whose sum is σ = 920472. Its totient is φ = 898392.

The previous prime is 909409. The next prime is 909437. The reversal of 909431 is 134909.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-909431 is a prime.

It is a super-2 number, since 2×909431² = 1654129487522, 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 909431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5396 + ... + 5561.

It is an arithmetic number, because the mean of its divisors is an integer number (230118).

2⁹⁰⁹⁴³¹ is an apocalyptic number.

909431 is a deficient number, since it is larger than the sum of its proper divisors (11041).

909431 is a wasteful number, since it uses less digits than its factorization.

909431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11040.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 909431 is about 953.6409177463. The cubic root of 909431 is about 96.8850091635.

The spelling of 909431 in words is "nine hundred nine thousand, four hundred thirty-one".