253644047 has 4 divisors (see below), whose sum is σ = 253684200. Its totient is φ = 253603896.

The previous prime is 253644043. The next prime is 253644049. The reversal of 253644047 is 740446352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253644047 - 2² = 253644043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253643998 and 253644016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253644043) 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, 8297 + ... + 24002.

It is an arithmetic number, because the mean of its divisors is an integer number (63421050).

Almost surely, 2^253644047 is an apocalyptic number.

253644047 is a deficient number, since it is larger than the sum of its proper divisors (40153).

253644047 is an equidigital number, since it uses as much as digits as its factorization.

253644047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40152.

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 253644047 is about 15926.2062965416. The cubic root of 253644047 is about 633.0065802636.

The spelling of 253644047 in words is "two hundred fifty-three million, six hundred forty-four thousand, forty-seven".