252777779 has 4 divisors (see below), whose sum is σ = 258656376. Its totient is φ = 246899184.

The previous prime is 252777773. The next prime is 252777793. The reversal of 252777779 is 977777252.

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 252777779 - 2⁸ = 252777523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252777779.

It is not an unprimeable number, because it can be changed into a prime (252777773) 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, 2939234 + ... + 2939319.

It is an arithmetic number, because the mean of its divisors is an integer number (64664094).

Almost surely, 2^252777779 is an apocalyptic number.

252777779 is a deficient number, since it is larger than the sum of its proper divisors (5878597).

252777779 is an equidigital number, since it uses as much as digits as its factorization.

252777779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5878596.

The product of its digits is 3025260, while the sum is 53.

The square root of 252777779 is about 15898.9867287195. The cubic root of 252777779 is about 632.2851246124.

The spelling of 252777779 in words is "two hundred fifty-two million, seven hundred seventy-seven thousand, seven hundred seventy-nine".