253889897 has 2 divisors, whose sum is σ = 253889898. Its totient is φ = 253889896.

The previous prime is 253889887. The next prime is 253889899. The reversal of 253889897 is 798988352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214212496 + 39677401 = 14636^2 + 6299^2 .

It is a cyclic number.

It is not a de Polignac number, because 253889897 - 2⁶ = 253889833 is a prime.

Together with 253889899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253889899) 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, 126944948 + 126944949.

It is an arithmetic number, because the mean of its divisors is an integer number (126944949).

Almost surely, 2^253889897 is an apocalyptic number.

It is an amenable number.

253889897 is a deficient number, since it is larger than the sum of its proper divisors (1).

253889897 is an equidigital number, since it uses as much as digits as its factorization.

253889897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 59.

The square root of 253889897 is about 15933.9228377697. The cubic root of 253889897 is about 633.2110326787.

The spelling of 253889897 in words is "two hundred fifty-three million, eight hundred eighty-nine thousand, eight hundred ninety-seven".