860077961 has 2 divisors, whose sum is σ = 860077962. Its totient is φ = 860077960.

The previous prime is 860077949. The next prime is 860077963. The reversal of 860077961 is 169770068.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 545689600 + 314388361 = 23360^2 + 17731^2 .

It is a cyclic number.

It is not a de Polignac number, because 860077961 - 2²² = 855883657 is a prime.

Together with 860077963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (860077963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430038980 + 430038981.

It is an arithmetic number, because the mean of its divisors is an integer number (430038981).

Almost surely, 2^860077961 is an apocalyptic number.

It is an amenable number.

860077961 is a deficient number, since it is larger than the sum of its proper divisors (1).

860077961 is an equidigital number, since it uses as much as digits as its factorization.

860077961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 860077961 is about 29327.0857911249. The cubic root of 860077961 is about 950.9972762741.

The spelling of 860077961 in words is "eight hundred sixty million, seventy-seven thousand, nine hundred sixty-one".