82099973 has 2 divisors, whose sum is σ = 82099974. Its totient is φ = 82099972.

The previous prime is 82099907. The next prime is 82100009. The reversal of 82099973 is 37999028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76615009 + 5484964 = 8753^2 + 2342^2 .

It is a cyclic number.

It is not a de Polignac number, because 82099973 - 2¹⁰ = 82098949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82099373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41049986 + 41049987.

It is an arithmetic number, because the mean of its divisors is an integer number (41049987).

Almost surely, 2^82099973 is an apocalyptic number.

It is an amenable number.

82099973 is a deficient number, since it is larger than the sum of its proper divisors (1).

82099973 is an equidigital number, since it uses as much as digits as its factorization.

82099973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 82099973 is about 9060.9035421419. The cubic root of 82099973 is about 434.6246341287.

The spelling of 82099973 in words is "eighty-two million, ninety-nine thousand, nine hundred seventy-three".