253000643 has 8 divisors (see below), whose sum is σ = 293459712. Its totient is φ = 213620616.

The previous prime is 253000607. The next prime is 253000661. The reversal of 253000643 is 346000352.

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 253000643 - 2⁸ = 253000387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253000603) 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, 269255 + ... + 270192.

It is an arithmetic number, because the mean of its divisors is an integer number (36682464).

Almost surely, 2^253000643 is an apocalyptic number.

253000643 is a deficient number, since it is larger than the sum of its proper divisors (40459069).

253000643 is an equidigital number, since it uses as much as digits as its factorization.

253000643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539521.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 253000643 is about 15905.9939331058. The cubic root of 253000643 is about 632.4708901495.

Adding to 253000643 its reverse (346000352), we get a palindrome (599000995).

The spelling of 253000643 in words is "two hundred fifty-three million, six hundred forty-three", and thus it is an aban number.