83420261 has 2 divisors, whose sum is σ = 83420262. Its totient is φ = 83420260.

The previous prime is 83420257. The next prime is 83420263. The reversal of 83420261 is 16202438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80550625 + 2869636 = 8975^2 + 1694^2 .

It is a cyclic number.

It is not a de Polignac number, because 83420261 - 2² = 83420257 is a prime.

Together with 83420263, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83420261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83420263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41710130 + 41710131.

It is an arithmetic number, because the mean of its divisors is an integer number (41710131).

Almost surely, 2^83420261 is an apocalyptic number.

It is an amenable number.

83420261 is a deficient number, since it is larger than the sum of its proper divisors (1).

83420261 is an equidigital number, since it uses as much as digits as its factorization.

83420261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 83420261 is about 9133.4692751440. The cubic root of 83420261 is about 436.9420562125.

Adding to 83420261 its reverse (16202438), we get a palindrome (99622699).

The spelling of 83420261 in words is "eighty-three million, four hundred twenty thousand, two hundred sixty-one".