260998591 has 4 divisors (see below), whose sum is σ = 298284112. Its totient is φ = 223713072.

The previous prime is 260998571. The next prime is 260998607. The reversal of 260998591 is 195899062.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 260998591 - 2⁵ = 260998559 is a prime.

It is a super-3 number, since 3×260998591³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260998511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18642750 + ... + 18642763.

It is an arithmetic number, because the mean of its divisors is an integer number (74571028).

Almost surely, 2^260998591 is an apocalyptic number.

260998591 is a deficient number, since it is larger than the sum of its proper divisors (37285521).

260998591 is an equidigital number, since it uses as much as digits as its factorization.

260998591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37285520.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 260998591 is about 16155.4508138894. The cubic root of 260998591 is about 639.0665028426.

The spelling of 260998591 in words is "two hundred sixty million, nine hundred ninety-eight thousand, five hundred ninety-one".