261327339 has 72 divisors (see below), whose sum is σ = 479693760. Its totient is φ = 135862272.

The previous prime is 261327331. The next prime is 261327347. The reversal of 261327339 is 933723162.

261327339 is a `hidden beast` number, since 2 + 613 + 2 + 7 + 3 + 39 = 666.

It is an interprime number because it is at equal distance from previous prime (261327331) and next prime (261327347).

It is not a de Polignac number, because 261327339 - 2³ = 261327331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261327331) 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 in 71 ways as a sum of consecutive naturals, for example, 452619 + ... + 453195.

Almost surely, 2^261327339 is an apocalyptic number.

261327339 is a deficient number, since it is larger than the sum of its proper divisors (218366421).

261327339 is a wasteful number, since it uses less digits than its factorization.

261327339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 679 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 261327339 is about 16165.6221346412. The cubic root of 261327339 is about 639.3347082334.

The spelling of 261327339 in words is "two hundred sixty-one million, three hundred twenty-seven thousand, three hundred thirty-nine".