253005397 has 4 divisors (see below), whose sum is σ = 253069036. Its totient is φ = 252941760.

The previous prime is 253005317. The next prime is 253005439. The reversal of 253005397 is 793500352.

253005397 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 can be written as a sum of positive squares in 2 ways, for example, as 238671601 + 14333796 = 15449^2 + 3786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253005397 is a prime.

It is a super-2 number, since 2×253005397² = 128023461822255218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253005317) 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, 25428 + ... + 33949.

It is an arithmetic number, because the mean of its divisors is an integer number (63267259).

Almost surely, 2^253005397 is an apocalyptic number.

It is an amenable number.

253005397 is a deficient number, since it is larger than the sum of its proper divisors (63639).

253005397 is an equidigital number, since it uses as much as digits as its factorization.

253005397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63638.

The product of its (nonzero) digits is 28350, while the sum is 34.

The square root of 253005397 is about 15906.1433729236. The cubic root of 253005397 is about 632.4748515990.

The spelling of 253005397 in words is "two hundred fifty-three million, five thousand, three hundred ninety-seven".