869399 has 2 divisors, whose sum is σ = 869400. Its totient is φ = 869398.

The previous prime is 869381. The next prime is 869413. The reversal of 869399 is 993968.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869399 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434699 + 434700.

It is an arithmetic number, because the mean of its divisors is an integer number (434700).

2⁸⁶⁹³⁹⁹ is an apocalyptic number.

869399 is a deficient number, since it is larger than the sum of its proper divisors (1).

869399 is an equidigital number, since it uses as much as digits as its factorization.

869399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 44.

The square root of 869399 is about 932.4156798338. The cubic root of 869399 is about 95.4420397002.

The spelling of 869399 in words is "eight hundred sixty-nine thousand, three hundred ninety-nine".