253638941 has 2 divisors, whose sum is σ = 253638942. Its totient is φ = 253638940.

The previous prime is 253638911. The next prime is 253638943. The reversal of 253638941 is 149836352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220403716 + 33235225 = 14846^2 + 5765^2 .

It is a cyclic number.

It is not a de Polignac number, because 253638941 - 2⁶ = 253638877 is a prime.

Together with 253638943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253638943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126819470 + 126819471.

It is an arithmetic number, because the mean of its divisors is an integer number (126819471).

Almost surely, 2^253638941 is an apocalyptic number.

It is an amenable number.

253638941 is a deficient number, since it is larger than the sum of its proper divisors (1).

253638941 is an equidigital number, since it uses as much as digits as its factorization.

253638941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 253638941 is about 15926.0459939057. The cubic root of 253638941 is about 633.0023326401.

The spelling of 253638941 in words is "two hundred fifty-three million, six hundred thirty-eight thousand, nine hundred forty-one".