253557853 has 2 divisors, whose sum is σ = 253557854. Its totient is φ = 253557852.

The previous prime is 253557791. The next prime is 253557859. The reversal of 253557853 is 358755352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237252409 + 16305444 = 15403^2 + 4038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253557853 is a prime.

It is the 15924-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253557859) by changing a digit.

It is a nontrivial repunit in base 15923.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126778926 + 126778927.

It is an arithmetic number, because the mean of its divisors is an integer number (126778927).

Almost surely, 2^253557853 is an apocalyptic number.

It is an amenable number.

253557853 is a deficient number, since it is larger than the sum of its proper divisors (1).

253557853 is an equidigital number, since it uses as much as digits as its factorization.

253557853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 630000, while the sum is 43.

The square root of 253557853 is about 15923.5000235501. The cubic root of 253557853 is about 632.9348688090.

The spelling of 253557853 in words is "two hundred fifty-three million, five hundred fifty-seven thousand, eight hundred fifty-three".