252477989 has 4 divisors (see below), whose sum is σ = 252558720. Its totient is φ = 252397260.

The previous prime is 252477977. The next prime is 252477991. The reversal of 252477989 is 989774252.

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 252477989 - 2¹⁶ = 252412453 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 252477989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252477689) 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, 35477 + ... + 41994.

It is an arithmetic number, because the mean of its divisors is an integer number (63139680).

Almost surely, 2^252477989 is an apocalyptic number.

It is an amenable number.

252477989 is a deficient number, since it is larger than the sum of its proper divisors (80731).

252477989 is an equidigital number, since it uses as much as digits as its factorization.

252477989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80730.

The product of its digits is 2540160, while the sum is 53.

The square root of 252477989 is about 15889.5559723990. Note that the first 3 decimals coincide. The cubic root of 252477989 is about 632.0350660523.

The spelling of 252477989 in words is "two hundred fifty-two million, four hundred seventy-seven thousand, nine hundred eighty-nine".