249778699 has 2 divisors, whose sum is σ = 249778700. Its totient is φ = 249778698.

The previous prime is 249778681. The next prime is 249778709. The reversal of 249778699 is 996877942.

249778699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249778699 is a prime.

It is not a weakly prime, because it can be changed into another prime (249778619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124889349 + 124889350.

It is an arithmetic number, because the mean of its divisors is an integer number (124889350).

Almost surely, 2^249778699 is an apocalyptic number.

249778699 is a deficient number, since it is larger than the sum of its proper divisors (1).

249778699 is an equidigital number, since it uses as much as digits as its factorization.

249778699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 61.

The square root of 249778699 is about 15804.3885993733. The cubic root of 249778699 is about 629.7745888807.

The spelling of 249778699 in words is "two hundred forty-nine million, seven hundred seventy-eight thousand, six hundred ninety-nine".