252789639 has 8 divisors (see below), whose sum is σ = 340145520. Its totient is φ = 166980096.

The previous prime is 252789629. The next prime is 252789671. The reversal of 252789639 is 936987252.

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

It is not a de Polignac number, because 252789639 - 2⁹ = 252789127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252789591 and 252789600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252789629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386202 + ... + 386855.

It is an arithmetic number, because the mean of its divisors is an integer number (42518190).

Almost surely, 2^252789639 is an apocalyptic number.

252789639 is a deficient number, since it is larger than the sum of its proper divisors (87355881).

252789639 is a wasteful number, since it uses less digits than its factorization.

252789639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773169.

The product of its digits is 1632960, while the sum is 51.

The square root of 252789639 is about 15899.3597040887. The cubic root of 252789639 is about 632.2950131191.

The spelling of 252789639 in words is "two hundred fifty-two million, seven hundred eighty-nine thousand, six hundred thirty-nine".