99706399 has 4 divisors (see below), whose sum is σ = 107376136. Its totient is φ = 92036664.

The previous prime is 99706381. The next prime is 99706417. The reversal of 99706399 is 99360799.

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

It is an interprime number because it is at equal distance from previous prime (99706381) and next prime (99706417).

It is a cyclic number.

It is not a de Polignac number, because 99706399 - 2⁵ = 99706367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99706349) 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, 3834849 + ... + 3834874.

It is an arithmetic number, because the mean of its divisors is an integer number (26844034).

Almost surely, 2^99706399 is an apocalyptic number.

99706399 is a deficient number, since it is larger than the sum of its proper divisors (7669737).

99706399 is a wasteful number, since it uses less digits than its factorization.

99706399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7669736.

The product of its (nonzero) digits is 826686, while the sum is 52.

The square root of 99706399 is about 9985.3091589595. The cubic root of 99706399 is about 463.7041796913.

The spelling of 99706399 in words is "ninety-nine million, seven hundred six thousand, three hundred ninety-nine".