616431 has 4 divisors (see below), whose sum is σ = 821912. Its totient is φ = 410952.

The previous prime is 616411. The next prime is 616433. The reversal of 616431 is 134616.

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

It is not a de Polignac number, because 616431 - 2⁶ = 616367 is a prime.

It is a super-2 number, since 2×616431² = 759974355522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616398 and 616407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616433) 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, 102736 + ... + 102741.

It is an arithmetic number, because the mean of its divisors is an integer number (205478).

2⁶¹⁶⁴³¹ is an apocalyptic number.

616431 is a deficient number, since it is larger than the sum of its proper divisors (205481).

616431 is a wasteful number, since it uses less digits than its factorization.

616431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205480.

The product of its digits is 432, while the sum is 21.

The square root of 616431 is about 785.1311992272. The cubic root of 616431 is about 85.1062569648.

The spelling of 616431 in words is "six hundred sixteen thousand, four hundred thirty-one".