261424349 has 2 divisors, whose sum is σ = 261424350. Its totient is φ = 261424348.

The previous prime is 261424327. The next prime is 261424381. The reversal of 261424349 is 943424162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201129124 + 60295225 = 14182^2 + 7765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261424349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261424399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130712174 + 130712175.

It is an arithmetic number, because the mean of its divisors is an integer number (130712175).

Almost surely, 2^261424349 is an apocalyptic number.

It is an amenable number.

261424349 is a deficient number, since it is larger than the sum of its proper divisors (1).

261424349 is an equidigital number, since it uses as much as digits as its factorization.

261424349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 35.

The square root of 261424349 is about 16168.6223593725. The cubic root of 261424349 is about 639.4138097762.

The spelling of 261424349 in words is "two hundred sixty-one million, four hundred twenty-four thousand, three hundred forty-nine".