253445663 has 4 divisors (see below), whose sum is σ = 255955128. Its totient is φ = 250936200.

The previous prime is 253445659. The next prime is 253445669. The reversal of 253445663 is 366544352.

It is a happy number.

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 253445663 - 2² = 253445659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253445669) 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, 1254581 + ... + 1254782.

It is an arithmetic number, because the mean of its divisors is an integer number (63988782).

Almost surely, 2^253445663 is an apocalyptic number.

253445663 is a deficient number, since it is larger than the sum of its proper divisors (2509465).

253445663 is a wasteful number, since it uses less digits than its factorization.

253445663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509464.

The product of its digits is 259200, while the sum is 38.

The square root of 253445663 is about 15919.9768529982. The cubic root of 253445663 is about 632.8415049243.

The spelling of 253445663 in words is "two hundred fifty-three million, four hundred forty-five thousand, six hundred sixty-three".