249992111 has 2 divisors, whose sum is σ = 249992112. Its totient is φ = 249992110.

The previous prime is 249992087. The next prime is 249992179. The reversal of 249992111 is 111299942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249992111 - 2¹⁰ = 249991087 is a prime.

It is a Sophie Germain 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 (249991111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124996055 + 124996056.

It is an arithmetic number, because the mean of its divisors is an integer number (124996056).

Almost surely, 2^249992111 is an apocalyptic number.

249992111 is a deficient number, since it is larger than the sum of its proper divisors (1).

249992111 is an equidigital number, since it uses as much as digits as its factorization.

249992111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 38.

The square root of 249992111 is about 15811.1388267892. The cubic root of 249992111 is about 629.9538985330.

The spelling of 249992111 in words is "two hundred forty-nine million, nine hundred ninety-two thousand, one hundred eleven".