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316991 is a prime number
BaseRepresentation
bin1001101011000111111
3121002211102
41031120333
540120431
610443315
72460113
oct1153077
9532742
10316991
111a7184
1213353b
13b138c
1483743
1563dcb
hex4d63f

316991 has 2 divisors, whose sum is σ = 316992. Its totient is φ = 316990.

The previous prime is 316961. The next prime is 317003. The reversal of 316991 is 199613.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 316991 - 210 = 315967 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 316991.

It is not a weakly prime, because it can be changed into another prime (316951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158495 + 158496.

It is an arithmetic number, because the mean of its divisors is an integer number (158496).

2316991 is an apocalyptic number.

316991 is a deficient number, since it is larger than the sum of its proper divisors (1).

316991 is an equidigital number, since it uses as much as digits as its factorization.

316991 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 316991 is about 563.0195378493. The cubic root of 316991 is about 68.1839741271.

The spelling of 316991 in words is "three hundred sixteen thousand, nine hundred ninety-one".