249243073 has 2 divisors, whose sum is σ = 249243074. Its totient is φ = 249243072.

The previous prime is 249243061. The next prime is 249243091. The reversal of 249243073 is 370342942.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168818049 + 80425024 = 12993^2 + 8968^2 .

It is a cyclic number.

It is not a de Polignac number, because 249243073 - 2⁵ = 249243041 is a prime.

It is not a weakly prime, because it can be changed into another prime (249243013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124621536 + 124621537.

It is an arithmetic number, because the mean of its divisors is an integer number (124621537).

Almost surely, 2^249243073 is an apocalyptic number.

It is an amenable number.

249243073 is a deficient number, since it is larger than the sum of its proper divisors (1).

249243073 is an equidigital number, since it uses as much as digits as its factorization.

249243073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 249243073 is about 15787.4340220316. The cubic root of 249243073 is about 629.3241033747.

The spelling of 249243073 in words is "two hundred forty-nine million, two hundred forty-three thousand, seventy-three".