83961313 has 2 divisors, whose sum is σ = 83961314. Its totient is φ = 83961312.

The previous prime is 83961287. The next prime is 83961343. The reversal of 83961313 is 31316938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43930384 + 40030929 = 6628^2 + 6327^2 .

It is a cyclic number.

It is not a de Polignac number, because 83961313 - 2⁹ = 83960801 is a prime.

It is not a weakly prime, because it can be changed into another prime (83961343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41980656 + 41980657.

It is an arithmetic number, because the mean of its divisors is an integer number (41980657).

Almost surely, 2^83961313 is an apocalyptic number.

It is an amenable number.

83961313 is a deficient number, since it is larger than the sum of its proper divisors (1).

83961313 is an equidigital number, since it uses as much as digits as its factorization.

83961313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 83961313 is about 9163.0405979675. The cubic root of 83961313 is about 437.8846693560.

The spelling of 83961313 in words is "eighty-three million, nine hundred sixty-one thousand, three hundred thirteen".