83975989 has 2 divisors, whose sum is σ = 83975990. Its totient is φ = 83975988.

The previous prime is 83975963. The next prime is 83975999. The reversal of 83975989 is 98957938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68310225 + 15665764 = 8265^2 + 3958^2 .

It is a cyclic number.

It is not a de Polignac number, because 83975989 - 2¹⁹ = 83451701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83975929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41987994 + 41987995.

It is an arithmetic number, because the mean of its divisors is an integer number (41987995).

Almost surely, 2^83975989 is an apocalyptic number.

It is an amenable number.

83975989 is a deficient number, since it is larger than the sum of its proper divisors (1).

83975989 is an equidigital number, since it uses as much as digits as its factorization.

83975989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 58.

The square root of 83975989 is about 9163.8413888500. The cubic root of 83975989 is about 437.9101811891.

The spelling of 83975989 in words is "eighty-three million, nine hundred seventy-five thousand, nine hundred eighty-nine".