83619971 has 2 divisors, whose sum is σ = 83619972. Its totient is φ = 83619970.

The previous prime is 83619961. The next prime is 83620001. The reversal of 83619971 is 17991638.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83619971 - 2¹⁴ = 83603587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83619901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41809985 + 41809986.

It is an arithmetic number, because the mean of its divisors is an integer number (41809986).

Almost surely, 2^83619971 is an apocalyptic number.

83619971 is a deficient number, since it is larger than the sum of its proper divisors (1).

83619971 is an equidigital number, since it uses as much as digits as its factorization.

83619971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 44.

The square root of 83619971 is about 9144.3956060529. The cubic root of 83619971 is about 437.2904614000.

The spelling of 83619971 in words is "eighty-three million, six hundred nineteen thousand, nine hundred seventy-one".