83404109 has 2 divisors, whose sum is σ = 83404110. Its totient is φ = 83404108.

The previous prime is 83404099. The next prime is 83404117. The reversal of 83404109 is 90140438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70190884 + 13213225 = 8378^2 + 3635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83404109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83404169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41702054 + 41702055.

It is an arithmetic number, because the mean of its divisors is an integer number (41702055).

Almost surely, 2^83404109 is an apocalyptic number.

It is an amenable number.

83404109 is a deficient number, since it is larger than the sum of its proper divisors (1).

83404109 is an equidigital number, since it uses as much as digits as its factorization.

83404109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 83404109 is about 9132.5850119230. The cubic root of 83404109 is about 436.9138538567.

The spelling of 83404109 in words is "eighty-three million, four hundred four thousand, one hundred nine".