99999967 has 4 divisors (see below), whose sum is σ = 105882336. Its totient is φ = 94117600.

The previous prime is 99999959. The next prime is 99999971. The reversal of 99999967 is 76999999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76999999 = 5099 ⋅15101.

It is a cyclic number.

It is not a de Polignac number, because 99999967 - 2³ = 99999959 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 (99999167) 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, 2941159 + ... + 2941192.

It is an arithmetic number, because the mean of its divisors is an integer number (26470584).

Almost surely, 2^99999967 is an apocalyptic number.

99999967 is a deficient number, since it is larger than the sum of its proper divisors (5882369).

99999967 is a wasteful number, since it uses less digits than its factorization.

99999967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882368.

The product of its digits is 22320522, while the sum is 67.

The square root of 99999967 is about 9999.9983499999. The cubic root of 99999967 is about 464.1588323038.

The spelling of 99999967 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-seven".