83118517 has 2 divisors, whose sum is σ = 83118518. Its totient is φ = 83118516.

The previous prime is 83118479. The next prime is 83118523. The reversal of 83118517 is 71581138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78960996 + 4157521 = 8886^2 + 2039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83118517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83118577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41559258 + 41559259.

It is an arithmetic number, because the mean of its divisors is an integer number (41559259).

Almost surely, 2^83118517 is an apocalyptic number.

It is an amenable number.

83118517 is a deficient number, since it is larger than the sum of its proper divisors (1).

83118517 is an equidigital number, since it uses as much as digits as its factorization.

83118517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 34.

The square root of 83118517 is about 9116.9357242442. The cubic root of 83118517 is about 436.4145907025.

The spelling of 83118517 in words is "eighty-three million, one hundred eighteen thousand, five hundred seventeen".