99655709 has 2 divisors, whose sum is σ = 99655710. Its totient is φ = 99655708.

The previous prime is 99655691. The next prime is 99655727. The reversal of 99655709 is 90755699.

It is a balanced prime because it is at equal distance from previous prime (99655691) and next prime (99655727).

It can be written as a sum of positive squares in only one way, i.e., 85192900 + 14462809 = 9230^2 + 3803^2 .

It is an emirp because it is prime and its reverse (90755699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99655709 - 2¹⁶ = 99590173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99655729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49827854 + 49827855.

It is an arithmetic number, because the mean of its divisors is an integer number (49827855).

Almost surely, 2^99655709 is an apocalyptic number.

It is an amenable number.

99655709 is a deficient number, since it is larger than the sum of its proper divisors (1).

99655709 is an equidigital number, since it uses as much as digits as its factorization.

99655709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 765450, while the sum is 50.

The square root of 99655709 is about 9982.7706074015. The cubic root of 99655709 is about 463.6255851059.

The spelling of 99655709 in words is "ninety-nine million, six hundred fifty-five thousand, seven hundred nine".