249823697 has 2 divisors, whose sum is σ = 249823698. Its totient is φ = 249823696.

The previous prime is 249823669. The next prime is 249823709. The reversal of 249823697 is 796328942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249608401 + 215296 = 15799^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 249823697 - 2⁶ = 249823633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (249823897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124911848 + 124911849.

It is an arithmetic number, because the mean of its divisors is an integer number (124911849).

Almost surely, 2^249823697 is an apocalyptic number.

It is an amenable number.

249823697 is a deficient number, since it is larger than the sum of its proper divisors (1).

249823697 is an equidigital number, since it uses as much as digits as its factorization.

249823697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 249823697 is about 15805.8121271892. The cubic root of 249823697 is about 629.8124048827.

The spelling of 249823697 in words is "two hundred forty-nine million, eight hundred twenty-three thousand, six hundred ninety-seven".