253890849749 has 2 divisors, whose sum is σ = 253890849750. Its totient is φ = 253890849748.

The previous prime is 253890849733. The next prime is 253890849761. The reversal of 253890849749 is 947948098352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233078459524 + 20812390225 = 482782^2 + 144265^2 .

It is a cyclic number.

It is not a de Polignac number, because 253890849749 - 2⁴ = 253890849733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253890849349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126945424874 + 126945424875.

It is an arithmetic number, because the mean of its divisors is an integer number (126945424875).

Almost surely, 2^253890849749 is an apocalyptic number.

It is an amenable number.

253890849749 is a deficient number, since it is larger than the sum of its proper divisors (1).

253890849749 is an equidigital number, since it uses as much as digits as its factorization.

253890849749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156764160, while the sum is 68.

The spelling of 253890849749 in words is "two hundred fifty-three billion, eight hundred ninety million, eight hundred forty-nine thousand, seven hundred forty-nine".