83116261 has 2 divisors, whose sum is σ = 83116262. Its totient is φ = 83116260.

The previous prime is 83116249. The next prime is 83116331. The reversal of 83116261 is 16261138.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60372900 + 22743361 = 7770^2 + 4769^2 .

It is a cyclic number.

It is not a de Polignac number, because 83116261 - 2⁹ = 83115749 is a prime.

It is a Chen prime.

It is equal to p_4840651 and since 83116261 and 4840651 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83116661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41558130 + 41558131.

It is an arithmetic number, because the mean of its divisors is an integer number (41558131).

Almost surely, 2^83116261 is an apocalyptic number.

It is an amenable number.

83116261 is a deficient number, since it is larger than the sum of its proper divisors (1).

83116261 is an equidigital number, since it uses as much as digits as its factorization.

83116261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 83116261 is about 9116.8119976229. The cubic root of 83116261 is about 436.4106422834.

Adding to 83116261 its reverse (16261138), we get a palindrome (99377399).

The spelling of 83116261 in words is "eighty-three million, one hundred sixteen thousand, two hundred sixty-one".