249426797 has 4 divisors (see below), whose sum is σ = 249917340. Its totient is φ = 248936256.

The previous prime is 249426769. The next prime is 249426803. The reversal of 249426797 is 797624942.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125126596 + 124300201 = 11186^2 + 11149^2 .

It is a cyclic number.

It is not a de Polignac number, because 249426797 - 2¹⁸ = 249164653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249426197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244508 + ... + 245525.

It is an arithmetic number, because the mean of its divisors is an integer number (62479335).

Almost surely, 2^249426797 is an apocalyptic number.

It is an amenable number.

249426797 is a deficient number, since it is larger than the sum of its proper divisors (490543).

249426797 is an equidigital number, since it uses as much as digits as its factorization.

249426797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490542.

The product of its digits is 1524096, while the sum is 50.

The square root of 249426797 is about 15793.2516284646. The cubic root of 249426797 is about 629.4786961616.

The spelling of 249426797 in words is "two hundred forty-nine million, four hundred twenty-six thousand, seven hundred ninety-seven".