99878711 has 2 divisors, whose sum is σ = 99878712. Its totient is φ = 99878710.

The previous prime is 99878707. The next prime is 99878717. The reversal of 99878711 is 11787899.

It is a weak prime.

It is an emirp because it is prime and its reverse (11787899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99878711 - 2² = 99878707 is a prime.

It is a super-2 number, since 2×99878711² = 19951513822043042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99878711.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99878717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49939355 + 49939356.

It is an arithmetic number, because the mean of its divisors is an integer number (49939356).

Almost surely, 2^99878711 is an apocalyptic number.

99878711 is a deficient number, since it is larger than the sum of its proper divisors (1).

99878711 is an equidigital number, since it uses as much as digits as its factorization.

99878711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 50.

The square root of 99878711 is about 9993.9337100063. The cubic root of 99878711 is about 463.9711495513.

The spelling of 99878711 in words is "ninety-nine million, eight hundred seventy-eight thousand, seven hundred eleven".