249878663 has 2 divisors, whose sum is σ = 249878664. Its totient is φ = 249878662.

The previous prime is 249878639. The next prime is 249878677. The reversal of 249878663 is 366878942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249878663 - 2¹⁶ = 249813127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249878683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124939331 + 124939332.

It is an arithmetic number, because the mean of its divisors is an integer number (124939332).

Almost surely, 2^249878663 is an apocalyptic number.

249878663 is a deficient number, since it is larger than the sum of its proper divisors (1).

249878663 is an equidigital number, since it uses as much as digits as its factorization.

249878663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 53.

The square root of 249878663 is about 15807.5508223127. The cubic root of 249878663 is about 629.8585917610.

The spelling of 249878663 in words is "two hundred forty-nine million, eight hundred seventy-eight thousand, six hundred sixty-three".