261324329 has 8 divisors (see below), whose sum is σ = 298777920. Its totient is φ = 223901136.

The previous prime is 261324319. The next prime is 261324341. The reversal of 261324329 is 923423162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261324329 - 2⁴ = 261324313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261324295 and 261324304.

It is not an unprimeable number, because it can be changed into a prime (261324319) 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 7 ways as a sum of consecutive naturals, for example, 15527 + ... + 27635.

It is an arithmetic number, because the mean of its divisors is an integer number (37347240).

Almost surely, 2^261324329 is an apocalyptic number.

It is an amenable number.

261324329 is a deficient number, since it is larger than the sum of its proper divisors (37453591).

261324329 is a wasteful number, since it uses less digits than its factorization.

261324329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15199.

The product of its digits is 15552, while the sum is 32.

The square root of 261324329 is about 16165.5290355744. The cubic root of 261324329 is about 639.3322535791.

The spelling of 261324329 in words is "two hundred sixty-one million, three hundred twenty-four thousand, three hundred twenty-nine".