253649247 has 16 divisors (see below), whose sum is σ = 347198208. Its totient is φ = 164617920.

The previous prime is 253649239. The next prime is 253649251. The reversal of 253649247 is 742946352.

It is not a de Polignac number, because 253649247 - 2³ = 253649239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253649199 and 253649208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253649257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62358 + ... + 66300.

It is an arithmetic number, because the mean of its divisors is an integer number (21699888).

Almost surely, 2^253649247 is an apocalyptic number.

253649247 is a deficient number, since it is larger than the sum of its proper divisors (93548961).

253649247 is a wasteful number, since it uses less digits than its factorization.

253649247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510.

The product of its digits is 362880, while the sum is 42.

The square root of 253649247 is about 15926.3695486448. The cubic root of 253649247 is about 633.0109060261.

The spelling of 253649247 in words is "two hundred fifty-three million, six hundred forty-nine thousand, two hundred forty-seven".