78000099 has 4 divisors (see below), whose sum is σ = 104000136. Its totient is φ = 52000064.

The previous prime is 78000089. The next prime is 78000101. The reversal of 78000099 is 99000087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99000087 = 3 ⋅33000029.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78000099 is a prime.

78000099 is a modest number, since divided by 99 gives 78 as remainder.

It is not an unprimeable number, because it can be changed into a prime (78000019) 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, 13000014 + ... + 13000019.

It is an arithmetic number, because the mean of its divisors is an integer number (26000034).

Almost surely, 2^78000099 is an apocalyptic number.

78000099 is a deficient number, since it is larger than the sum of its proper divisors (26000037).

78000099 is a wasteful number, since it uses less digits than its factorization.

78000099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26000036.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 78000099 is about 8831.7664710974. The cubic root of 78000099 is about 427.2660489360.

The spelling of 78000099 in words is "seventy-eight million, ninety-nine", and thus it is an aban number and an uban number.