253970005 has 4 divisors (see below), whose sum is σ = 304764012. Its totient is φ = 203176000.

The previous prime is 253969973. The next prime is 253970027. The reversal of 253970005 is 500079352.

It is a happy number.

253970005 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 117874449 + 136095556 = 10857^2 + 11666^2 .

It is not a de Polignac number, because 253970005 - 2⁵ = 253969973 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25396996 + ... + 25397005.

It is an arithmetic number, because the mean of its divisors is an integer number (76191003).

Almost surely, 2^253970005 is an apocalyptic number.

It is an amenable number.

253970005 is a deficient number, since it is larger than the sum of its proper divisors (50794007).

253970005 is an equidigital number, since it uses as much as digits as its factorization.

253970005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50794006.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 253970005 is about 15936.4363958822. The cubic root of 253970005 is about 633.2776231391.

The spelling of 253970005 in words is "two hundred fifty-three million, nine hundred seventy thousand, five".