253897999 has 4 divisors (see below), whose sum is σ = 254275936. Its totient is φ = 253520064.

The previous prime is 253897997. The next prime is 253898011. The reversal of 253897999 is 999798352.

253897999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253897999 - 2¹ = 253897997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253897993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187959 + ... + 189304.

It is an arithmetic number, because the mean of its divisors is an integer number (63568984).

Almost surely, 2^253897999 is an apocalyptic number.

253897999 is a deficient number, since it is larger than the sum of its proper divisors (377937).

253897999 is an equidigital number, since it uses as much as digits as its factorization.

253897999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377936.

The product of its digits is 11022480, while the sum is 61.

The square root of 253897999 is about 15934.1770731971. The cubic root of 253897999 is about 633.2177681722.

The spelling of 253897999 in words is "two hundred fifty-three million, eight hundred ninety-seven thousand, nine hundred ninety-nine".