83129287 has 2 divisors, whose sum is σ = 83129288. Its totient is φ = 83129286.

The previous prime is 83129279. The next prime is 83129311. The reversal of 83129287 is 78292138.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83129287 - 2³ = 83129279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83129227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41564643 + 41564644.

It is an arithmetic number, because the mean of its divisors is an integer number (41564644).

Almost surely, 2^83129287 is an apocalyptic number.

83129287 is a deficient number, since it is larger than the sum of its proper divisors (1).

83129287 is an equidigital number, since it uses as much as digits as its factorization.

83129287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 83129287 is about 9117.5263640968. The cubic root of 83129287 is about 436.4334392188.

The spelling of 83129287 in words is "eighty-three million, one hundred twenty-nine thousand, two hundred eighty-seven".