78999692 has 6 divisors (see below), whose sum is σ = 138249468. Its totient is φ = 39499844.

The previous prime is 78999691. The next prime is 78999707. The reversal of 78999692 is 29699987.

It is not an unprimeable number, because it can be changed into a prime (78999691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9874958 + ... + 9874965.

It is an arithmetic number, because the mean of its divisors is an integer number (23041578).

Almost surely, 2^78999692 is an apocalyptic number.

It is an amenable number.

78999692 is a deficient number, since it is larger than the sum of its proper divisors (59249776).

78999692 is a wasteful number, since it uses less digits than its factorization.

78999692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19749927 (or 19749925 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 59.

The square root of 78999692 is about 8888.1770909450. The cubic root of 78999692 is about 429.0834850737.

The spelling of 78999692 in words is "seventy-eight million, nine hundred ninety-nine thousand, six hundred ninety-two".