866421419 has 2 divisors, whose sum is σ = 866421420. Its totient is φ = 866421418.

The previous prime is 866421403. The next prime is 866421463. The reversal of 866421419 is 914124668.

866421419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866421419 - 2⁴ = 866421403 is a prime.

It is a super-2 number, since 2×866421419² = 1501372150603947122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (866421499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433210709 + 433210710.

It is an arithmetic number, because the mean of its divisors is an integer number (433210710).

Almost surely, 2^866421419 is an apocalyptic number.

866421419 is a deficient number, since it is larger than the sum of its proper divisors (1).

866421419 is an equidigital number, since it uses as much as digits as its factorization.

866421419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 866421419 is about 29435.0372685342. The cubic root of 866421419 is about 953.3295612377.

The spelling of 866421419 in words is "eight hundred sixty-six million, four hundred twenty-one thousand, four hundred nineteen".