261201349 has 2 divisors, whose sum is σ = 261201350. Its totient is φ = 261201348.

The previous prime is 261201313. The next prime is 261201377. The reversal of 261201349 is 943102162.

It is an a-pointer prime, because the next prime (261201377) can be obtained adding 261201349 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211498849 + 49702500 = 14543^2 + 7050^2 .

It is a cyclic number.

It is not a de Polignac number, because 261201349 - 2²³ = 252812741 is a prime.

It is a super-2 number, since 2×261201349² = 136452289438839602, 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 (261201749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130600674 + 130600675.

It is an arithmetic number, because the mean of its divisors is an integer number (130600675).

Almost surely, 2^261201349 is an apocalyptic number.

It is an amenable number.

261201349 is a deficient number, since it is larger than the sum of its proper divisors (1).

261201349 is an equidigital number, since it uses as much as digits as its factorization.

261201349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 261201349 is about 16161.7248151303. The cubic root of 261201349 is about 639.2319472946.

The spelling of 261201349 in words is "two hundred sixty-one million, two hundred one thousand, three hundred forty-nine".