261047119 has 2 divisors, whose sum is σ = 261047120. Its totient is φ = 261047118.

The previous prime is 261047089. The next prime is 261047131. The reversal of 261047119 is 911740162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261047119 is a prime.

It is a super-2 number, since 2×261047119² = 136291196676400322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261047819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130523559 + 130523560.

It is an arithmetic number, because the mean of its divisors is an integer number (130523560).

Almost surely, 2^261047119 is an apocalyptic number.

261047119 is a deficient number, since it is larger than the sum of its proper divisors (1).

261047119 is an equidigital number, since it uses as much as digits as its factorization.

261047119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 261047119 is about 16156.9526520319. The cubic root of 261047119 is about 639.1061080338.

It can be divided in two parts, 2610 and 47119, that added together give a square (49729 = 223²).

The spelling of 261047119 in words is "two hundred sixty-one million, forty-seven thousand, one hundred nineteen".