249599261 has 2 divisors, whose sum is σ = 249599262. Its totient is φ = 249599260.

The previous prime is 249599249. The next prime is 249599327. The reversal of 249599261 is 162995942.

It is a happy number.

249599261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155625625 + 93973636 = 12475^2 + 9694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249599261 is a prime.

It is a super-2 number, since 2×249599261² = 124599582183492242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249599461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124799630 + 124799631.

It is an arithmetic number, because the mean of its divisors is an integer number (124799631).

Almost surely, 2^249599261 is an apocalyptic number.

It is an amenable number.

249599261 is a deficient number, since it is larger than the sum of its proper divisors (1).

249599261 is an equidigital number, since it uses as much as digits as its factorization.

249599261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 249599261 is about 15798.7107385381. The cubic root of 249599261 is about 629.6237452679.

The spelling of 249599261 in words is "two hundred forty-nine million, five hundred ninety-nine thousand, two hundred sixty-one".