248999879 has 2 divisors, whose sum is σ = 248999880. Its totient is φ = 248999878.

The previous prime is 248999857. The next prime is 248999957. The reversal of 248999879 is 978999842.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248999879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248999809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124499939 + 124499940.

It is an arithmetic number, because the mean of its divisors is an integer number (124499940).

Almost surely, 2^248999879 is an apocalyptic number.

248999879 is a deficient number, since it is larger than the sum of its proper divisors (1).

248999879 is an equidigital number, since it uses as much as digits as its factorization.

248999879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23514624, while the sum is 65.

The square root of 248999879 is about 15779.7300040273. The cubic root of 248999879 is about 629.1193532501.

The spelling of 248999879 in words is "two hundred forty-eight million, nine hundred ninety-nine thousand, eight hundred seventy-nine".