868933421 has 2 divisors, whose sum is σ = 868933422. Its totient is φ = 868933420.

The previous prime is 868933369. The next prime is 868933423. The reversal of 868933421 is 124339868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 808264900 + 60668521 = 28430^2 + 7789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868933421 is a prime.

Together with 868933423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868933423) 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, 434466710 + 434466711.

It is an arithmetic number, because the mean of its divisors is an integer number (434466711).

Almost surely, 2^868933421 is an apocalyptic number.

It is an amenable number.

868933421 is a deficient number, since it is larger than the sum of its proper divisors (1).

868933421 is an equidigital number, since it uses as much as digits as its factorization.

868933421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The square root of 868933421 is about 29477.6766553947. The cubic root of 868933421 is about 954.2499967455.

The spelling of 868933421 in words is "eight hundred sixty-eight million, nine hundred thirty-three thousand, four hundred twenty-one".