83713121 has 2 divisors, whose sum is σ = 83713122. Its totient is φ = 83713120.

The previous prime is 83713093. The next prime is 83713187. The reversal of 83713121 is 12131738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73702225 + 10010896 = 8585^2 + 3164^2 .

It is a cyclic number.

It is not a de Polignac number, because 83713121 - 2⁶ = 83713057 is a prime.

It is not a weakly prime, because it can be changed into another prime (83713621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41856560 + 41856561.

It is an arithmetic number, because the mean of its divisors is an integer number (41856561).

Almost surely, 2^83713121 is an apocalyptic number.

It is an amenable number.

83713121 is a deficient number, since it is larger than the sum of its proper divisors (1).

83713121 is an equidigital number, since it uses as much as digits as its factorization.

83713121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 83713121 is about 9149.4874719844. The cubic root of 83713121 is about 437.4527770527.

Adding to 83713121 its reverse (12131738), we get a palindrome (95844859).

The spelling of 83713121 in words is "eighty-three million, seven hundred thirteen thousand, one hundred twenty-one".