253662139 has 4 divisors (see below), whose sum is σ = 253767024. Its totient is φ = 253557256.

The previous prime is 253662137. The next prime is 253662161. The reversal of 253662139 is 931266352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253662139 - 2¹ = 253662137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253662098 and 253662107.

It is not an unprimeable number, because it can be changed into a prime (253662131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48727 + ... + 53680.

It is an arithmetic number, because the mean of its divisors is an integer number (63441756).

Almost surely, 2^253662139 is an apocalyptic number.

253662139 is a deficient number, since it is larger than the sum of its proper divisors (104885).

253662139 is a wasteful number, since it uses less digits than its factorization.

253662139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104884.

The product of its digits is 58320, while the sum is 37.

The square root of 253662139 is about 15926.7742810652. The cubic root of 253662139 is about 633.0216303347.

The spelling of 253662139 in words is "two hundred fifty-three million, six hundred sixty-two thousand, one hundred thirty-nine".