83219987 has 2 divisors, whose sum is σ = 83219988. Its totient is φ = 83219986.

The previous prime is 83219959. The next prime is 83220001. The reversal of 83219987 is 78991238.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83219987 - 2⁶ = 83219923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83219687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41609993 + 41609994.

It is an arithmetic number, because the mean of its divisors is an integer number (41609994).

Almost surely, 2^83219987 is an apocalyptic number.

83219987 is a deficient number, since it is larger than the sum of its proper divisors (1).

83219987 is an equidigital number, since it uses as much as digits as its factorization.

83219987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 83219987 is about 9122.4989449164. The cubic root of 83219987 is about 436.5921082293.

The spelling of 83219987 in words is "eighty-three million, two hundred nineteen thousand, nine hundred eighty-seven".