249939743 has 2 divisors, whose sum is σ = 249939744. Its totient is φ = 249939742.

The previous prime is 249939727. The next prime is 249939787. The reversal of 249939743 is 347939942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249939743 - 2⁴ = 249939727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249939691 and 249939700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249939713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124969871 + 124969872.

It is an arithmetic number, because the mean of its divisors is an integer number (124969872).

Almost surely, 2^249939743 is an apocalyptic number.

249939743 is a deficient number, since it is larger than the sum of its proper divisors (1).

249939743 is an equidigital number, since it uses as much as digits as its factorization.

249939743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 50.

The square root of 249939743 is about 15809.4826923590. The cubic root of 249939743 is about 629.9099081721.

The spelling of 249939743 in words is "two hundred forty-nine million, nine hundred thirty-nine thousand, seven hundred forty-three".