97999723 has 2 divisors, whose sum is σ = 97999724. Its totient is φ = 97999722.

The previous prime is 97999673. The next prime is 97999751. The reversal of 97999723 is 32799979.

It is a strong prime.

It is an emirp because it is prime and its reverse (32799979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97999723 - 2¹⁷ = 97868651 is a prime.

It is not a weakly prime, because it can be changed into another prime (97999753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48999861 + 48999862.

It is an arithmetic number, because the mean of its divisors is an integer number (48999862).

Almost surely, 2^97999723 is an apocalyptic number.

97999723 is a deficient number, since it is larger than the sum of its proper divisors (1).

97999723 is an equidigital number, since it uses as much as digits as its factorization.

97999723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1928934, while the sum is 55.

The square root of 97999723 is about 9899.4809459890. The cubic root of 97999723 is about 461.0431948208.

The spelling of 97999723 in words is "ninety-seven million, nine hundred ninety-nine thousand, seven hundred twenty-three".