99777299 has 4 divisors (see below), whose sum is σ = 99797280. Its totient is φ = 99757320.

The previous prime is 99777281. The next prime is 99777317. The reversal of 99777299 is 99277799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99277799 = 79 ⋅1256681.

It is an interprime number because it is at equal distance from previous prime (99777281) and next prime (99777317).

It is a cyclic number.

It is not a de Polignac number, because 99777299 - 2⁸ = 99777043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99777599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4769 + ... + 14909.

It is an arithmetic number, because the mean of its divisors is an integer number (24949320).

Almost surely, 2^99777299 is an apocalyptic number.

99777299 is a deficient number, since it is larger than the sum of its proper divisors (19981).

99777299 is a wasteful number, since it uses less digits than its factorization.

99777299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19980.

The product of its digits is 4500846, while the sum is 59.

The square root of 99777299 is about 9988.8587436203. The cubic root of 99777299 is about 463.8140651049.

Subtracting from 99777299 its reverse (99277799), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 99777299 in words is "ninety-nine million, seven hundred seventy-seven thousand, two hundred ninety-nine".