99977309 has 2 divisors, whose sum is σ = 99977310. Its totient is φ = 99977308.

The previous prime is 99977299. The next prime is 99977327. The reversal of 99977309 is 90377999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 77284 = 9995^2 + 278^2 .

It is an emirp because it is prime and its reverse (90377999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99977309 - 2²⁰ = 98928733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99977399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49988654 + 49988655.

It is an arithmetic number, because the mean of its divisors is an integer number (49988655).

Almost surely, 2^99977309 is an apocalyptic number.

It is an amenable number.

99977309 is a deficient number, since it is larger than the sum of its proper divisors (1).

99977309 is an equidigital number, since it uses as much as digits as its factorization.

99977309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 964467, while the sum is 53.

The square root of 99977309 is about 9998.8653856325. The cubic root of 99977309 is about 464.1237732748.

The spelling of 99977309 in words is "ninety-nine million, nine hundred seventy-seven thousand, three hundred nine".