99071779 has 4 divisors (see below), whose sum is σ = 99096480. Its totient is φ = 99047080.

The previous prime is 99071773. The next prime is 99071789. The reversal of 99071779 is 97717099.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99071779 - 2⁹ = 99071267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99071773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4792 + ... + 14869.

It is an arithmetic number, because the mean of its divisors is an integer number (24774120).

Almost surely, 2^99071779 is an apocalyptic number.

99071779 is a deficient number, since it is larger than the sum of its proper divisors (24701).

99071779 is a wasteful number, since it uses less digits than its factorization.

99071779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24700.

The product of its (nonzero) digits is 250047, while the sum is 49.

The square root of 99071779 is about 9953.4807479595. The cubic root of 99071779 is about 462.7182767101.

The spelling of 99071779 in words is "ninety-nine million, seventy-one thousand, seven hundred seventy-nine".