253661047 has 2 divisors, whose sum is σ = 253661048. Its totient is φ = 253661046.

The previous prime is 253661041. The next prime is 253661071. The reversal of 253661047 is 740166352.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253661047 - 2²⁷ = 119443319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253661041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126830523 + 126830524.

It is an arithmetic number, because the mean of its divisors is an integer number (126830524).

Almost surely, 2^253661047 is an apocalyptic number.

253661047 is a deficient number, since it is larger than the sum of its proper divisors (1).

253661047 is an equidigital number, since it uses as much as digits as its factorization.

253661047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 253661047 is about 15926.7399991335. The cubic root of 253661047 is about 633.0207219602.

The spelling of 253661047 in words is "two hundred fifty-three million, six hundred sixty-one thousand, forty-seven".