253855649 has 2 divisors, whose sum is σ = 253855650. Its totient is φ = 253855648.

The previous prime is 253855639. The next prime is 253855691. The reversal of 253855649 is 946558352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215502400 + 38353249 = 14680^2 + 6193^2 .

It is a cyclic number.

It is not a de Polignac number, because 253855649 - 2⁴ = 253855633 is a prime.

It is a super-2 number, since 2×253855649² = 128885381058422402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253855619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126927824 + 126927825.

It is an arithmetic number, because the mean of its divisors is an integer number (126927825).

Almost surely, 2^253855649 is an apocalyptic number.

It is an amenable number.

253855649 is a deficient number, since it is larger than the sum of its proper divisors (1).

253855649 is an equidigital number, since it uses as much as digits as its factorization.

253855649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 47.

The square root of 253855649 is about 15932.8481132533. The cubic root of 253855649 is about 633.1825594614.

The spelling of 253855649 in words is "two hundred fifty-three million, eight hundred fifty-five thousand, six hundred forty-nine".