253842749 has 2 divisors, whose sum is σ = 253842750. Its totient is φ = 253842748.

The previous prime is 253842739. The next prime is 253842763. The reversal of 253842749 is 947248352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229734649 + 24108100 = 15157^2 + 4910^2 .

It is a cyclic number.

It is not a de Polignac number, because 253842749 - 2⁴ = 253842733 is a prime.

It is a super-2 number, since 2×253842749² = 128872282439754002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253842709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126921374 + 126921375.

It is an arithmetic number, because the mean of its divisors is an integer number (126921375).

Almost surely, 2^253842749 is an apocalyptic number.

It is an amenable number.

253842749 is a deficient number, since it is larger than the sum of its proper divisors (1).

253842749 is an equidigital number, since it uses as much as digits as its factorization.

253842749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 44.

The square root of 253842749 is about 15932.4432840666. The cubic root of 253842749 is about 633.1718339521.

The spelling of 253842749 in words is "two hundred fifty-three million, eight hundred forty-two thousand, seven hundred forty-nine".