860428649 has 2 divisors, whose sum is σ = 860428650. Its totient is φ = 860428648.

The previous prime is 860428631. The next prime is 860428663. The reversal of 860428649 is 946824068.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494395225 + 366033424 = 22235^2 + 19132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-860428649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (860128649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430214324 + 430214325.

It is an arithmetic number, because the mean of its divisors is an integer number (430214325).

Almost surely, 2^860428649 is an apocalyptic number.

It is an amenable number.

860428649 is a deficient number, since it is larger than the sum of its proper divisors (1).

860428649 is an equidigital number, since it uses as much as digits as its factorization.

860428649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 860428649 is about 29333.0640915674. The cubic root of 860428649 is about 951.1265118515.

The spelling of 860428649 in words is "eight hundred sixty million, four hundred twenty-eight thousand, six hundred forty-nine".