869381 has 2 divisors, whose sum is σ = 869382. Its totient is φ = 869380.

The previous prime is 869371. The next prime is 869399. The reversal of 869381 is 183968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538756 + 330625 = 734^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 869381 - 2⁶ = 869317 is a prime.

It is a super-2 number, since 2×869381² = 1511646646322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869321) 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, 434690 + 434691.

It is an arithmetic number, because the mean of its divisors is an integer number (434691).

2⁸⁶⁹³⁸¹ is an apocalyptic number.

It is an amenable number.

869381 is a deficient number, since it is larger than the sum of its proper divisors (1).

869381 is an equidigital number, since it uses as much as digits as its factorization.

869381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 869381 is about 932.4060274365. The cubic root of 869381 is about 95.4413810197.

The spelling of 869381 in words is "eight hundred sixty-nine thousand, three hundred eighty-one".