253499949 has 10 divisors (see below), whose sum is σ = 378685230. Its totient is φ = 168999912.

The previous prime is 253499923. The next prime is 253499959. The reversal of 253499949 is 949994352.

253499949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 231344100 + 22155849 = 15210^2 + 4707^2 .

It is not a de Polignac number, because 253499949 - 2⁹ = 253499437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 253499895 and 253499904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253499959) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1564734 + ... + 1564895.

It is an arithmetic number, because the mean of its divisors is an integer number (37868523).

Almost surely, 2^253499949 is an apocalyptic number.

It is an amenable number.

253499949 is a deficient number, since it is larger than the sum of its proper divisors (125185281).

253499949 is an equidigital number, since it uses as much as digits as its factorization.

253499949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129641 (or 3129632 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 253499949 is about 15921.6817265011. The cubic root of 253499949 is about 632.8866848667.

The spelling of 253499949 in words is "two hundred fifty-three million, four hundred ninety-nine thousand, nine hundred forty-nine".