253897997 has 2 divisors, whose sum is σ = 253897998. Its totient is φ = 253897996.

The previous prime is 253897993. The next prime is 253898011. The reversal of 253897997 is 799798352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251507881 + 2390116 = 15859^2 + 1546^2 .

It is a cyclic number.

It is not a de Polignac number, because 253897997 - 2² = 253897993 is a prime.

It is a super-2 number, since 2×253897997² = 128928385761224018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253897993) 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, 126948998 + 126948999.

It is an arithmetic number, because the mean of its divisors is an integer number (126948999).

Almost surely, 2^253897997 is an apocalyptic number.

It is an amenable number.

253897997 is a deficient number, since it is larger than the sum of its proper divisors (1).

253897997 is an equidigital number, since it uses as much as digits as its factorization.

253897997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8573040, while the sum is 59.

The square root of 253897997 is about 15934.1770104389. The cubic root of 253897997 is about 633.2177665095.

The spelling of 253897997 in words is "two hundred fifty-three million, eight hundred ninety-seven thousand, nine hundred ninety-seven".