252785993 has 4 divisors (see below), whose sum is σ = 252835968. Its totient is φ = 252736020.

The previous prime is 252785987. The next prime is 252786019. The reversal of 252785993 is 399587252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252785993 - 2²² = 248591689 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 (252785983) 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 3 ways as a sum of consecutive naturals, for example, 16421 + ... + 27842.

It is an arithmetic number, because the mean of its divisors is an integer number (63208992).

Almost surely, 2^252785993 is an apocalyptic number.

It is an amenable number.

252785993 is a deficient number, since it is larger than the sum of its proper divisors (49975).

252785993 is an equidigital number, since it uses as much as digits as its factorization.

252785993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49974.

The product of its digits is 1360800, while the sum is 50.

The square root of 252785993 is about 15899.2450449699. The cubic root of 252785993 is about 632.2919732283.

The spelling of 252785993 in words is "two hundred fifty-two million, seven hundred eighty-five thousand, nine hundred ninety-three".