261098929 has 8 divisors (see below), whose sum is σ = 321352640. Its totient is φ = 206583696.

The previous prime is 261098911. The next prime is 261098941. The reversal of 261098929 is 929890162.

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 261098929 - 2¹¹ = 261096881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261098909) 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, 1434519 + ... + 1434700.

It is an arithmetic number, because the mean of its divisors is an integer number (40169080).

Almost surely, 2^261098929 is an apocalyptic number.

It is an amenable number.

261098929 is a deficient number, since it is larger than the sum of its proper divisors (60253711).

261098929 is a wasteful number, since it uses less digits than its factorization.

261098929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869239.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 261098929 is about 16158.5559070110. Note that the first 3 decimals coincide. The cubic root of 261098929 is about 639.1483863490.

The spelling of 261098929 in words is "two hundred sixty-one million, ninety-eight thousand, nine hundred twenty-nine".