249404999 has 2 divisors, whose sum is σ = 249405000. Its totient is φ = 249404998.

The previous prime is 249404993. The next prime is 249405029. The reversal of 249404999 is 999404942.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249404999 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 (249404993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124702499 + 124702500.

It is an arithmetic number, because the mean of its divisors is an integer number (124702500).

Almost surely, 2^249404999 is an apocalyptic number.

249404999 is a deficient number, since it is larger than the sum of its proper divisors (1).

249404999 is an equidigital number, since it uses as much as digits as its factorization.

249404999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 249404999 is about 15792.5615085077. The cubic root of 249404999 is about 629.4603584148.

The spelling of 249404999 in words is "two hundred forty-nine million, four hundred four thousand, nine hundred ninety-nine".