253603949 has 2 divisors, whose sum is σ = 253603950. Its totient is φ = 253603948.

The previous prime is 253603939. The next prime is 253603951. The reversal of 253603949 is 949306352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228553924 + 25050025 = 15118^2 + 5005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253603949 is a prime.

Together with 253603951, 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 (253603919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126801974 + 126801975.

It is an arithmetic number, because the mean of its divisors is an integer number (126801975).

Almost surely, 2^253603949 is an apocalyptic number.

It is an amenable number.

253603949 is a deficient number, since it is larger than the sum of its proper divisors (1).

253603949 is an equidigital number, since it uses as much as digits as its factorization.

253603949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 253603949 is about 15924.9473782490. The cubic root of 253603949 is about 632.9732216576.

The spelling of 253603949 in words is "two hundred fifty-three million, six hundred three thousand, nine hundred forty-nine".