83819993 has 2 divisors, whose sum is σ = 83819994. Its totient is φ = 83819992.

The previous prime is 83819969. The next prime is 83820049. The reversal of 83819993 is 39991838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74166544 + 9653449 = 8612^2 + 3107^2 .

It is a cyclic number.

It is not a de Polignac number, because 83819993 - 2²⁴ = 67042777 is a prime.

It is not a weakly prime, because it can be changed into another prime (83809993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41909996 + 41909997.

It is an arithmetic number, because the mean of its divisors is an integer number (41909997).

Almost surely, 2^83819993 is an apocalyptic number.

It is an amenable number.

83819993 is a deficient number, since it is larger than the sum of its proper divisors (1).

83819993 is an equidigital number, since it uses as much as digits as its factorization.

83819993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 50.

The square root of 83819993 is about 9155.3259363061. The cubic root of 83819993 is about 437.6388552991.

The spelling of 83819993 in words is "eighty-three million, eight hundred nineteen thousand, nine hundred ninety-three".