261098339 has 8 divisors (see below), whose sum is σ = 270479520. Its totient is φ = 251742400.

The previous prime is 261098333. The next prime is 261098389. The reversal of 261098339 is 933890162.

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 261098339 - 2²⁰ = 260049763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261098296 and 261098305.

It is not an unprimeable number, because it can be changed into a prime (261098333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16154 + ... + 27984.

It is an arithmetic number, because the mean of its divisors is an integer number (33809940).

Almost surely, 2^261098339 is an apocalyptic number.

261098339 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

261098339 is a deficient number, since it is larger than the sum of its proper divisors (9381181).

261098339 is a wasteful number, since it uses less digits than its factorization.

261098339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12621.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 261098339 is about 16158.5376504187. The cubic root of 261098339 is about 639.1479049251.

The spelling of 261098339 in words is "two hundred sixty-one million, ninety-eight thousand, three hundred thirty-nine".