253717 has 2 divisors, whose sum is σ = 253718. Its totient is φ = 253716.

The previous prime is 253703. The next prime is 253733. The reversal of 253717 is 717352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167281 + 86436 = 409^2 + 294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253717 is a prime.

253717 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 253691 and 253700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126858 + 126859.

It is an arithmetic number, because the mean of its divisors is an integer number (126859).

2²⁵³⁷¹⁷ is an apocalyptic number.

It is an amenable number.

253717 is a deficient number, since it is larger than the sum of its proper divisors (1).

253717 is an equidigital number, since it uses as much as digits as its factorization.

253717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1470, while the sum is 25.

The square root of 253717 is about 503.7032856752. The cubic root of 253717 is about 63.3067262813.

The spelling of 253717 in words is "two hundred fifty-three thousand, seven hundred seventeen".