253870345 has 4 divisors (see below), whose sum is σ = 304644420. Its totient is φ = 203096272.

The previous prime is 253870339. The next prime is 253870363. The reversal of 253870345 is 543078352.

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 26101881 + 227768464 = 5109^2 + 15092^2 .

It is a cyclic number.

It is not a de Polignac number, because 253870345 - 2⁵ = 253870313 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25387030 + ... + 25387039.

It is an arithmetic number, because the mean of its divisors is an integer number (76161105).

Almost surely, 2^253870345 is an apocalyptic number.

It is an amenable number.

253870345 is a deficient number, since it is larger than the sum of its proper divisors (50774075).

253870345 is an equidigital number, since it uses as much as digits as its factorization.

253870345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50774074.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 253870345 is about 15933.3092921715. The cubic root of 253870345 is about 633.1947777849.

The spelling of 253870345 in words is "two hundred fifty-three million, eight hundred seventy thousand, three hundred forty-five".