916431 has 4 divisors (see below), whose sum is σ = 1221912. Its totient is φ = 610952.

The previous prime is 916417. The next prime is 916441. The reversal of 916431 is 134619.

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

It is a cyclic number.

It is not a de Polignac number, because 916431 - 2⁶ = 916367 is a prime.

It is a super-2 number, since 2×916431² = 1679691555522, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916411) 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, 152736 + ... + 152741.

It is an arithmetic number, because the mean of its divisors is an integer number (305478).

2⁹¹⁶⁴³¹ is an apocalyptic number.

916431 is a deficient number, since it is larger than the sum of its proper divisors (305481).

916431 is a wasteful number, since it uses less digits than its factorization.

916431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305480.

The product of its digits is 648, while the sum is 24.

The square root of 916431 is about 957.3040269423. The cubic root of 916431 is about 97.1329526275.

The spelling of 916431 in words is "nine hundred sixteen thousand, four hundred thirty-one".