253544749 has 4 divisors (see below), whose sum is σ = 268459164. Its totient is φ = 238630336.

The previous prime is 253544747. The next prime is 253544761. The reversal of 253544749 is 947445352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 167184900 + 86359849 = 12930^2 + 9293^2 .

It is a cyclic number.

It is not a de Polignac number, because 253544749 - 2¹ = 253544747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253544741) 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, 7457182 + ... + 7457215.

It is an arithmetic number, because the mean of its divisors is an integer number (67114791).

Almost surely, 2^253544749 is an apocalyptic number.

It is an amenable number.

253544749 is a deficient number, since it is larger than the sum of its proper divisors (14914415).

253544749 is a wasteful number, since it uses less digits than its factorization.

253544749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14914414.

The product of its digits is 604800, while the sum is 43.

The square root of 253544749 is about 15923.0885509062. The cubic root of 253544749 is about 632.9239651548.

It can be divided in two parts, 25354 and 4749, that added together give a palindrome (30103).

The spelling of 253544749 in words is "two hundred fifty-three million, five hundred forty-four thousand, seven hundred forty-nine".