260819987 has 2 divisors, whose sum is σ = 260819988. Its totient is φ = 260819986.

The previous prime is 260819981. The next prime is 260820029. The reversal of 260819987 is 789918062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260819987 - 2⁴ = 260819971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (260819981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130409993 + 130409994.

It is an arithmetic number, because the mean of its divisors is an integer number (130409994).

Almost surely, 2^260819987 is an apocalyptic number.

260819987 is a deficient number, since it is larger than the sum of its proper divisors (1).

260819987 is an equidigital number, since it uses as much as digits as its factorization.

260819987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 260819987 is about 16149.9221979550. The cubic root of 260819987 is about 638.9206963348.

The spelling of 260819987 in words is "two hundred sixty million, eight hundred nineteen thousand, nine hundred eighty-seven".