253439949 has 16 divisors (see below), whose sum is σ = 386416640. Its totient is φ = 144739440.

The previous prime is 253439947. The next prime is 253439957. The reversal of 253439949 is 949934352.

It is not a de Polignac number, because 253439949 - 2¹ = 253439947 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253439898 and 253439907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253439941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69432 + ... + 72990.

It is an arithmetic number, because the mean of its divisors is an integer number (24151040).

Almost surely, 2^253439949 is an apocalyptic number.

It is an amenable number.

253439949 is a deficient number, since it is larger than the sum of its proper divisors (132976691).

253439949 is a wasteful number, since it uses less digits than its factorization.

253439949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960.

The product of its digits is 1049760, while the sum is 48.

The square root of 253439949 is about 15919.7973919268. The cubic root of 253439949 is about 632.8367490284.

The spelling of 253439949 in words is "two hundred fifty-three million, four hundred thirty-nine thousand, nine hundred forty-nine".