99665723 has 2 divisors, whose sum is σ = 99665724. Its totient is φ = 99665722.

The previous prime is 99665677. The next prime is 99665777. The reversal of 99665723 is 32756699.

It is a weak prime.

It is an emirp because it is prime and its reverse (32756699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99665723 - 2¹⁴ = 99649339 is a prime.

It is a super-2 number, since 2×99665723² = 19866512682225458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99665023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49832861 + 49832862.

It is an arithmetic number, because the mean of its divisors is an integer number (49832862).

Almost surely, 2^99665723 is an apocalyptic number.

99665723 is a deficient number, since it is larger than the sum of its proper divisors (1).

99665723 is an equidigital number, since it uses as much as digits as its factorization.

99665723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 47.

The square root of 99665723 is about 9983.2721589667. The cubic root of 99665723 is about 463.6411138737.

The spelling of 99665723 in words is "ninety-nine million, six hundred sixty-five thousand, seven hundred twenty-three".