252978769 has 4 divisors (see below), whose sum is σ = 258361344. Its totient is φ = 247596196.

The previous prime is 252978763. The next prime is 252978797. The reversal of 252978769 is 967879252.

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 252978769 - 2⁷ = 252978641 is a prime.

It is a super-2 number, since 2×252978769² = 127996515129510722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252978763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2691217 + ... + 2691310.

It is an arithmetic number, because the mean of its divisors is an integer number (64590336).

Almost surely, 2^252978769 is an apocalyptic number.

It is an amenable number.

252978769 is a deficient number, since it is larger than the sum of its proper divisors (5382575).

252978769 is an equidigital number, since it uses as much as digits as its factorization.

252978769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5382574.

The product of its digits is 3810240, while the sum is 55.

The square root of 252978769 is about 15905.3063158180. The cubic root of 252978769 is about 632.4526621761.

The spelling of 252978769 in words is "two hundred fifty-two million, nine hundred seventy-eight thousand, seven hundred sixty-nine".