249198823 has 2 divisors, whose sum is σ = 249198824. Its totient is φ = 249198822.

The previous prime is 249198791. The next prime is 249198839. The reversal of 249198823 is 328891942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249198823 - 2⁵ = 249198791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249198883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124599411 + 124599412.

It is an arithmetic number, because the mean of its divisors is an integer number (124599412).

Almost surely, 2^249198823 is an apocalyptic number.

249198823 is a deficient number, since it is larger than the sum of its proper divisors (1).

249198823 is an equidigital number, since it uses as much as digits as its factorization.

249198823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 249198823 is about 15786.0325287895. The cubic root of 249198823 is about 629.2868582878.

The spelling of 249198823 in words is "two hundred forty-nine million, one hundred ninety-eight thousand, eight hundred twenty-three".