253689866 has 8 divisors (see below), whose sum is σ = 383531520. Its totient is φ = 125846028.

The previous prime is 253689857. The next prime is 253689869. The reversal of 253689866 is 668986352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×253689866² = 128717096222195912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253689869) by changing a digit.

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, 499136 + ... + 499643.

It is an arithmetic number, because the mean of its divisors is an integer number (47941440).

Almost surely, 2^253689866 is an apocalyptic number.

253689866 is a deficient number, since it is larger than the sum of its proper divisors (129841654).

253689866 is a wasteful number, since it uses less digits than its factorization.

253689866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998908.

The product of its digits is 3732480, while the sum is 53.

The square root of 253689866 is about 15927.6447097491. The cubic root of 253689866 is about 633.0446940200.

The spelling of 253689866 in words is "two hundred fifty-three million, six hundred eighty-nine thousand, eight hundred sixty-six".