249523243 has 2 divisors, whose sum is σ = 249523244. Its totient is φ = 249523242.

The previous prime is 249523231. The next prime is 249523273. The reversal of 249523243 is 342325942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249523243 - 2⁹ = 249522731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249523199 and 249523208.

It is not a weakly prime, because it can be changed into another prime (249523273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124761621 + 124761622.

It is an arithmetic number, because the mean of its divisors is an integer number (124761622).

Almost surely, 2^249523243 is an apocalyptic number.

249523243 is a deficient number, since it is larger than the sum of its proper divisors (1).

249523243 is an equidigital number, since it uses as much as digits as its factorization.

249523243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 34.

The square root of 249523243 is about 15796.3047261060. The cubic root of 249523243 is about 629.5598193338.

The spelling of 249523243 in words is "two hundred forty-nine million, five hundred twenty-three thousand, two hundred forty-three".