78599434 has 4 divisors (see below), whose sum is σ = 117899154. Its totient is φ = 39299716.

The previous prime is 78599429. The next prime is 78599453. The reversal of 78599434 is 43499587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43499587 = 683 ⋅63689.

It can be written as a sum of positive squares in only one way, i.e., 59213025 + 19386409 = 7695^2 + 4403^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 19649857 + ... + 19649860.

Almost surely, 2^78599434 is an apocalyptic number.

78599434 is a deficient number, since it is larger than the sum of its proper divisors (39299720).

78599434 is a wasteful number, since it uses less digits than its factorization.

78599434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39299719.

The product of its digits is 1088640, while the sum is 49.

The square root of 78599434 is about 8865.6321827606. The cubic root of 78599434 is about 428.3575963014.

The spelling of 78599434 in words is "seventy-eight million, five hundred ninety-nine thousand, four hundred thirty-four".