99985973 has 2 divisors, whose sum is σ = 99985974. Its totient is φ = 99985972.

The previous prime is 99985927. The next prime is 99985987. The reversal of 99985973 is 37958999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81306289 + 18679684 = 9017^2 + 4322^2 .

It is a cyclic number.

It is not a de Polignac number, because 99985973 - 2¹⁴ = 99969589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99985273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49992986 + 49992987.

It is an arithmetic number, because the mean of its divisors is an integer number (49992987).

Almost surely, 2^99985973 is an apocalyptic number.

It is an amenable number.

99985973 is a deficient number, since it is larger than the sum of its proper divisors (1).

99985973 is an equidigital number, since it uses as much as digits as its factorization.

99985973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 59.

The square root of 99985973 is about 9999.2986254037. The cubic root of 99985973 is about 464.1371798243.

The spelling of 99985973 in words is "ninety-nine million, nine hundred eighty-five thousand, nine hundred seventy-three".