838860851 has 2 divisors, whose sum is σ = 838860852. Its totient is φ = 838860850.

The previous prime is 838860833. The next prime is 838860857. The reversal of 838860851 is 158068838.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-838860851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 838860796 and 838860805.

It is not a weakly prime, because it can be changed into another prime (838860857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419430425 + 419430426.

It is an arithmetic number, because the mean of its divisors is an integer number (419430426).

Almost surely, 2^838860851 is an apocalyptic number.

838860851 is a deficient number, since it is larger than the sum of its proper divisors (1).

838860851 is an equidigital number, since it uses as much as digits as its factorization.

838860851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 368640, while the sum is 47.

The square root of 838860851 is about 28963.0946378318. The cubic root of 838860851 is about 943.1120827647.

The spelling of 838860851 in words is "eight hundred thirty-eight million, eight hundred sixty thousand, eight hundred fifty-one".