83916289 has 2 divisors, whose sum is σ = 83916290. Its totient is φ = 83916288.

The previous prime is 83916281. The next prime is 83916311. The reversal of 83916289 is 98261938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81144064 + 2772225 = 9008^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 83916289 - 2³ = 83916281 is a prime.

It is not a weakly prime, because it can be changed into another prime (83916281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41958144 + 41958145.

It is an arithmetic number, because the mean of its divisors is an integer number (41958145).

Almost surely, 2^83916289 is an apocalyptic number.

It is an amenable number.

83916289 is a deficient number, since it is larger than the sum of its proper divisors (1).

83916289 is an equidigital number, since it uses as much as digits as its factorization.

83916289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 83916289 is about 9160.5834421176. The cubic root of 83916289 is about 437.8063839180.

The spelling of 83916289 in words is "eighty-three million, nine hundred sixteen thousand, two hundred eighty-nine".