253997 has 8 divisors (see below), whose sum is σ = 274176. Its totient is φ = 234432.

The previous prime is 253993. The next prime is 253999. The reversal of 253997 is 799352.

253997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253997 - 2² = 253993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028 + ... + 1250.

It is an arithmetic number, because the mean of its divisors is an integer number (34272).

2²⁵³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

253997 is a deficient number, since it is larger than the sum of its proper divisors (20179).

253997 is a wasteful number, since it uses less digits than its factorization.

253997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307.

The product of its digits is 17010, while the sum is 35.

The square root of 253997 is about 503.9811504412. The cubic root of 253997 is about 63.3300059809.

The spelling of 253997 in words is "two hundred fifty-three thousand, nine hundred ninety-seven".