83655389 has 2 divisors, whose sum is σ = 83655390. Its totient is φ = 83655388.

The previous prime is 83655379. The next prime is 83655431. The reversal of 83655389 is 98355638.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65448100 + 18207289 = 8090^2 + 4267^2 .

It is a cyclic number.

It is not a de Polignac number, because 83655389 - 2⁴ = 83655373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83655379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41827694 + 41827695.

It is an arithmetic number, because the mean of its divisors is an integer number (41827695).

Almost surely, 2^83655389 is an apocalyptic number.

It is an amenable number.

83655389 is a deficient number, since it is larger than the sum of its proper divisors (1).

83655389 is an equidigital number, since it uses as much as digits as its factorization.

83655389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 47.

The square root of 83655389 is about 9146.3319970358. The cubic root of 83655389 is about 437.3521921373.

The spelling of 83655389 in words is "eighty-three million, six hundred fifty-five thousand, three hundred eighty-nine".