253680709 has 2 divisors, whose sum is σ = 253680710. Its totient is φ = 253680708.

The previous prime is 253680703. The next prime is 253680727. The reversal of 253680709 is 907086352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180150084 + 73530625 = 13422^2 + 8575^2 .

It is a cyclic number.

It is not a de Polignac number, because 253680709 - 2⁵ = 253680677 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253680703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126840354 + 126840355.

It is an arithmetic number, because the mean of its divisors is an integer number (126840355).

Almost surely, 2^253680709 is an apocalyptic number.

It is an amenable number.

253680709 is a deficient number, since it is larger than the sum of its proper divisors (1).

253680709 is an equidigital number, since it uses as much as digits as its factorization.

253680709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 253680709 is about 15927.3572509692. The cubic root of 253680709 is about 633.0370772922.

The spelling of 253680709 in words is "two hundred fifty-three million, six hundred eighty thousand, seven hundred nine".