260617391 has 2 divisors, whose sum is σ = 260617392. Its totient is φ = 260617390.

The previous prime is 260617351. The next prime is 260617421. The reversal of 260617391 is 193716062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260617391 - 2¹⁸ = 260355247 is a prime.

It is a super-3 number, since 3×260617391³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260617321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130308695 + 130308696.

It is an arithmetic number, because the mean of its divisors is an integer number (130308696).

Almost surely, 2^260617391 is an apocalyptic number.

260617391 is a deficient number, since it is larger than the sum of its proper divisors (1).

260617391 is an equidigital number, since it uses as much as digits as its factorization.

260617391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 260617391 is about 16143.6486272466. The cubic root of 260617391 is about 638.7552229382.

The spelling of 260617391 in words is "two hundred sixty million, six hundred seventeen thousand, three hundred ninety-one".