252978499 has 2 divisors, whose sum is σ = 252978500. Its totient is φ = 252978498.

The previous prime is 252978497. The next prime is 252978527. The reversal of 252978499 is 994879252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252978499 - 2¹ = 252978497 is a prime.

Together with 252978497, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (252978493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126489249 + 126489250.

It is an arithmetic number, because the mean of its divisors is an integer number (126489250).

Almost surely, 2^252978499 is an apocalyptic number.

252978499 is a deficient number, since it is larger than the sum of its proper divisors (1).

252978499 is an equidigital number, since it uses as much as digits as its factorization.

252978499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The square root of 252978499 is about 15905.2978280823. The cubic root of 252978499 is about 632.4524371740.

The spelling of 252978499 in words is "two hundred fifty-two million, nine hundred seventy-eight thousand, four hundred ninety-nine".