253642673 has 8 divisors (see below), whose sum is σ = 256324200. Its totient is φ = 250967808.

The previous prime is 253642657. The next prime is 253642679. The reversal of 253642673 is 376246352.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 104509729 + 149132944 = 10223^2 + 12212^2 .

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 253642673 - 2⁴ = 253642657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253642679) 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, 118073 + ... + 120201.

It is an arithmetic number, because the mean of its divisors is an integer number (32040525).

Almost surely, 2^253642673 is an apocalyptic number.

It is an amenable number.

253642673 is a deficient number, since it is larger than the sum of its proper divisors (2681527).

253642673 is a wasteful number, since it uses less digits than its factorization.

253642673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331.

The product of its digits is 181440, while the sum is 38.

The square root of 253642673 is about 15926.1631600332. The cubic root of 253642673 is about 633.0054372542.

The spelling of 253642673 in words is "two hundred fifty-three million, six hundred forty-two thousand, six hundred seventy-three".