83420863 has 2 divisors, whose sum is σ = 83420864. Its totient is φ = 83420862.

The previous prime is 83420837. The next prime is 83420879. The reversal of 83420863 is 36802438.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83420863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83420263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41710431 + 41710432.

It is an arithmetic number, because the mean of its divisors is an integer number (41710432).

Almost surely, 2^83420863 is an apocalyptic number.

83420863 is a deficient number, since it is larger than the sum of its proper divisors (1).

83420863 is an equidigital number, since it uses as much as digits as its factorization.

83420863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 83420863 is about 9133.5022307984. The cubic root of 83420863 is about 436.9431072700.

The spelling of 83420863 in words is "eighty-three million, four hundred twenty thousand, eight hundred sixty-three".