83634641 has 2 divisors, whose sum is σ = 83634642. Its totient is φ = 83634640.

The previous prime is 83634631. The next prime is 83634643. The reversal of 83634641 is 14643638.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 18671041 = 8060^2 + 4321^2 .

It is a cyclic number.

It is not a de Polignac number, because 83634641 - 2¹⁰ = 83633617 is a prime.

It is a Sophie Germain prime.

Together with 83634643, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (83634643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41817320 + 41817321.

It is an arithmetic number, because the mean of its divisors is an integer number (41817321).

Almost surely, 2^83634641 is an apocalyptic number.

It is an amenable number.

83634641 is a deficient number, since it is larger than the sum of its proper divisors (1).

83634641 is an equidigital number, since it uses as much as digits as its factorization.

83634641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 35.

The square root of 83634641 is about 9145.1977015262. The cubic root of 83634641 is about 437.3160321493.

The spelling of 83634641 in words is "eighty-three million, six hundred thirty-four thousand, six hundred forty-one".