83406569 has 2 divisors, whose sum is σ = 83406570. Its totient is φ = 83406568.

The previous prime is 83406551. The next prime is 83406601. The reversal of 83406569 is 96560438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51912025 + 31494544 = 7205^2 + 5612^2 .

It is a cyclic number.

It is not a de Polignac number, because 83406569 - 2²⁰ = 82357993 is a prime.

It is a super-2 number, since 2×83406569² = 13913311504703522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83406269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41703284 + 41703285.

It is an arithmetic number, because the mean of its divisors is an integer number (41703285).

Almost surely, 2^83406569 is an apocalyptic number.

It is an amenable number.

83406569 is a deficient number, since it is larger than the sum of its proper divisors (1).

83406569 is an equidigital number, since it uses as much as digits as its factorization.

83406569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 83406569 is about 9132.7196934977. The cubic root of 83406569 is about 436.9181493986.

The spelling of 83406569 in words is "eighty-three million, four hundred six thousand, five hundred sixty-nine".