253553617 has 2 divisors, whose sum is σ = 253553618. Its totient is φ = 253553616.

The previous prime is 253553611. The next prime is 253553627. The reversal of 253553617 is 716355352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252301456 + 1252161 = 15884^2 + 1119^2 .

It is a cyclic number.

It is not a de Polignac number, because 253553617 - 2²³ = 245165009 is a prime.

It is not a weakly prime, because it can be changed into another prime (253553611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126776808 + 126776809.

It is an arithmetic number, because the mean of its divisors is an integer number (126776809).

Almost surely, 2^253553617 is an apocalyptic number.

It is an amenable number.

253553617 is a deficient number, since it is larger than the sum of its proper divisors (1).

253553617 is an equidigital number, since it uses as much as digits as its factorization.

253553617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94500, while the sum is 37.

The square root of 253553617 is about 15923.3670120361. The cubic root of 253553617 is about 632.9313441340.

The spelling of 253553617 in words is "two hundred fifty-three million, five hundred fifty-three thousand, six hundred seventeen".