97823993 has 2 divisors, whose sum is σ = 97823994. Its totient is φ = 97823992.

The previous prime is 97823983. The next prime is 97824017. The reversal of 97823993 is 39932879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96983104 + 840889 = 9848^2 + 917^2 .

It is a cyclic number.

It is not a de Polignac number, because 97823993 - 2¹⁰ = 97822969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (97823963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48911996 + 48911997.

It is an arithmetic number, because the mean of its divisors is an integer number (48911997).

Almost surely, 2^97823993 is an apocalyptic number.

It is an amenable number.

97823993 is a deficient number, since it is larger than the sum of its proper divisors (1).

97823993 is an equidigital number, since it uses as much as digits as its factorization.

97823993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 50.

The square root of 97823993 is about 9890.6012456271. The cubic root of 97823993 is about 460.7674539193.

The spelling of 97823993 in words is "ninety-seven million, eight hundred twenty-three thousand, nine hundred ninety-three".