260934991 has 4 divisors (see below), whose sum is σ = 263329000. Its totient is φ = 258540984.

The previous prime is 260934983. The next prime is 260935021. The reversal of 260934991 is 199439062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199439062 = 2 ⋅99719531.

It is a cyclic number.

It is not a de Polignac number, because 260934991 - 2³ = 260934983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260934691) 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 3 ways as a sum of consecutive naturals, for example, 1196841 + ... + 1197058.

It is an arithmetic number, because the mean of its divisors is an integer number (65832250).

Almost surely, 2^260934991 is an apocalyptic number.

260934991 is a deficient number, since it is larger than the sum of its proper divisors (2394009).

260934991 is a wasteful number, since it uses less digits than its factorization.

260934991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394008.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 260934991 is about 16153.4823180638. The cubic root of 260934991 is about 639.0145894953.

The spelling of 260934991 in words is "two hundred sixty million, nine hundred thirty-four thousand, nine hundred ninety-one".