253844891 has 2 divisors, whose sum is σ = 253844892. Its totient is φ = 253844890.

The previous prime is 253844869. The next prime is 253844939. The reversal of 253844891 is 198448352.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253844891 is a prime.

It is not a weakly prime, because it can be changed into another prime (253844861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126922445 + 126922446.

It is an arithmetic number, because the mean of its divisors is an integer number (126922446).

Almost surely, 2^253844891 is an apocalyptic number.

253844891 is a deficient number, since it is larger than the sum of its proper divisors (1).

253844891 is an equidigital number, since it uses as much as digits as its factorization.

253844891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 44.

The square root of 253844891 is about 15932.5105052531. The cubic root of 253844891 is about 633.1736149107.

The spelling of 253844891 in words is "two hundred fifty-three million, eight hundred forty-four thousand, eight hundred ninety-one".