260198639 has 2 divisors, whose sum is σ = 260198640. Its totient is φ = 260198638.

The previous prime is 260198623. The next prime is 260198657. The reversal of 260198639 is 936891062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260198639 - 2⁴ = 260198623 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 260198639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260198339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130099319 + 130099320.

It is an arithmetic number, because the mean of its divisors is an integer number (130099320).

Almost surely, 2^260198639 is an apocalyptic number.

260198639 is a deficient number, since it is larger than the sum of its proper divisors (1).

260198639 is an equidigital number, since it uses as much as digits as its factorization.

260198639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 260198639 is about 16130.6738544923. The cubic root of 260198639 is about 638.4129288014.

The spelling of 260198639 in words is "two hundred sixty million, one hundred ninety-eight thousand, six hundred thirty-nine".