870690851 has 2 divisors, whose sum is σ = 870690852. Its totient is φ = 870690850.

The previous prime is 870690817. The next prime is 870690859. The reversal of 870690851 is 158096078.

It is a happy number.

870690851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 870690851 - 2⁶ = 870690787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (870690859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435345425 + 435345426.

It is an arithmetic number, because the mean of its divisors is an integer number (435345426).

Almost surely, 2^870690851 is an apocalyptic number.

870690851 is a deficient number, since it is larger than the sum of its proper divisors (1).

870690851 is an equidigital number, since it uses as much as digits as its factorization.

870690851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 870690851 is about 29507.4711047897. The cubic root of 870690851 is about 954.8928915082.

The spelling of 870690851 in words is "eight hundred seventy million, six hundred ninety thousand, eight hundred fifty-one".