253649239 has 2 divisors, whose sum is σ = 253649240. Its totient is φ = 253649238.

The previous prime is 253649191. The next prime is 253649251. The reversal of 253649239 is 932946352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253649239 - 2⁷ = 253649111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253649195 and 253649204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253649269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126824619 + 126824620.

It is an arithmetic number, because the mean of its divisors is an integer number (126824620).

Almost surely, 2^253649239 is an apocalyptic number.

253649239 is a deficient number, since it is larger than the sum of its proper divisors (1).

253649239 is an equidigital number, since it uses as much as digits as its factorization.

253649239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 43.

The square root of 253649239 is about 15926.3692974890. The cubic root of 253649239 is about 633.0108993712.

The spelling of 253649239 in words is "two hundred fifty-three million, six hundred forty-nine thousand, two hundred thirty-nine".