916931 has 2 divisors, whose sum is σ = 916932. Its totient is φ = 916930.

The previous prime is 916913. The next prime is 916933. The reversal of 916931 is 139619.

Together with previous prime (916913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (139619) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-916931 is a prime.

It is a super-2 number, since 2×916931² = 1681524917522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 916933, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 916894 and 916903.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 916931.

It is not a weakly prime, because it can be changed into another prime (916933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458465 + 458466.

It is an arithmetic number, because the mean of its divisors is an integer number (458466).

2⁹¹⁶⁹³¹ is an apocalyptic number.

916931 is a deficient number, since it is larger than the sum of its proper divisors (1).

916931 is an equidigital number, since it uses as much as digits as its factorization.

916931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 29.

The square root of 916931 is about 957.5651413873. The cubic root of 916931 is about 97.1506144942.

The spelling of 916931 in words is "nine hundred sixteen thousand, nine hundred thirty-one".