859207649 has 2 divisors, whose sum is σ = 859207650. Its totient is φ = 859207648.

The previous prime is 859207571. The next prime is 859207703. The reversal of 859207649 is 946702958.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 535459600 + 323748049 = 23140^2 + 17993^2 .

It is a cyclic number.

It is not a de Polignac number, because 859207649 - 2¹⁶ = 859142113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 859207597 and 859207606.

It is not a weakly prime, because it can be changed into another prime (859207049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429603824 + 429603825.

It is an arithmetic number, because the mean of its divisors is an integer number (429603825).

Almost surely, 2^859207649 is an apocalyptic number.

It is an amenable number.

859207649 is a deficient number, since it is larger than the sum of its proper divisors (1).

859207649 is an equidigital number, since it uses as much as digits as its factorization.

859207649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 859207649 is about 29312.2440116754. The cubic root of 859207649 is about 950.6763969636.

The spelling of 859207649 in words is "eight hundred fifty-nine million, two hundred seven thousand, six hundred forty-nine".