78930999 has 12 divisors (see below), whose sum is σ = 130298896. Its totient is φ = 45103392.

The previous prime is 78930989. The next prime is 78931003. The reversal of 78930999 is 99903987.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-78930999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78930989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 626374 + ... + 626499.

Almost surely, 2^78930999 is an apocalyptic number.

78930999 is a deficient number, since it is larger than the sum of its proper divisors (51367897).

78930999 is a wasteful number, since it uses less digits than its factorization.

78930999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252886 (or 1252883 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 78930999 is about 8884.3119598537. The cubic root of 78930999 is about 428.9590813011.

The spelling of 78930999 in words is "seventy-eight million, nine hundred thirty thousand, nine hundred ninety-nine".