253744069 has 4 divisors (see below), whose sum is σ = 267099040. Its totient is φ = 240389100.

The previous prime is 253744063. The next prime is 253744087. The reversal of 253744069 is 960447352.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253744069 - 2³ = 253744061 is a prime.

It is a super-2 number, since 2×253744069² = 128772105105353522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253744061) 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, 6677457 + ... + 6677494.

It is an arithmetic number, because the mean of its divisors is an integer number (66774760).

Almost surely, 2^253744069 is an apocalyptic number.

It is an amenable number.

253744069 is a deficient number, since it is larger than the sum of its proper divisors (13354971).

253744069 is a wasteful number, since it uses less digits than its factorization.

253744069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13354970.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 253744069 is about 15929.3461573286. The cubic root of 253744069 is about 633.0897759392.

The spelling of 253744069 in words is "two hundred fifty-three million, seven hundred forty-four thousand, sixty-nine".