249265013 has 2 divisors, whose sum is σ = 249265014. Its totient is φ = 249265012.

The previous prime is 249265001. The next prime is 249265039. The reversal of 249265013 is 310562942.

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., 208022929 + 41242084 = 14423^2 + 6422^2 .

It is a cyclic number.

It is not a de Polignac number, because 249265013 - 2¹² = 249260917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249265043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124632506 + 124632507.

It is an arithmetic number, because the mean of its divisors is an integer number (124632507).

Almost surely, 2^249265013 is an apocalyptic number.

It is an amenable number.

249265013 is a deficient number, since it is larger than the sum of its proper divisors (1).

249265013 is an equidigital number, since it uses as much as digits as its factorization.

249265013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 249265013 is about 15788.1288631680. The cubic root of 249265013 is about 629.3425685695.

The spelling of 249265013 in words is "two hundred forty-nine million, two hundred sixty-five thousand, thirteen".