869826379 has 2 divisors, whose sum is σ = 869826380. Its totient is φ = 869826378.

The previous prime is 869826371. The next prime is 869826401. The reversal of 869826379 is 973628968.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 869826379 - 2³ = 869826371 is a prime.

It is not a weakly prime, because it can be changed into another prime (869826371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434913189 + 434913190.

It is an arithmetic number, because the mean of its divisors is an integer number (434913190).

Almost surely, 2^869826379 is an apocalyptic number.

869826379 is a deficient number, since it is larger than the sum of its proper divisors (1).

869826379 is an equidigital number, since it uses as much as digits as its factorization.

869826379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 58.

The square root of 869826379 is about 29492.8191090645. The cubic root of 869826379 is about 954.5767626504.

The spelling of 869826379 in words is "eight hundred sixty-nine million, eight hundred twenty-six thousand, three hundred seventy-nine".