83788729 has 2 divisors, whose sum is σ = 83788730. Its totient is φ = 83788728.

The previous prime is 83788723. The next prime is 83788739. The reversal of 83788729 is 92788738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74425129 + 9363600 = 8627^2 + 3060^2 .

It is a cyclic number.

It is not a de Polignac number, because 83788729 - 2²⁵ = 50234297 is a prime.

It is a super-2 number, since 2×83788729² = 14041102214870882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83788723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41894364 + 41894365.

It is an arithmetic number, because the mean of its divisors is an integer number (41894365).

Almost surely, 2^83788729 is an apocalyptic number.

It is an amenable number.

83788729 is a deficient number, since it is larger than the sum of its proper divisors (1).

83788729 is an equidigital number, since it uses as much as digits as its factorization.

83788729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 52.

The square root of 83788729 is about 9153.6183556012. The cubic root of 83788729 is about 437.5844369272.

Subtracting 83788729 from its reverse (92788738), we obtain a palindrome (9000009).

The spelling of 83788729 in words is "eighty-three million, seven hundred eighty-eight thousand, seven hundred twenty-nine".