78963679 has 4 divisors (see below), whose sum is σ = 79079976. Its totient is φ = 78847384.

The previous prime is 78963673. The next prime is 78963733. The reversal of 78963679 is 97636987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97636987 = 7 ⋅13948141.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78963679 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 (78963673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57124 + ... + 58489.

It is an arithmetic number, because the mean of its divisors is an integer number (19769994).

Almost surely, 2^78963679 is an apocalyptic number.

78963679 is a deficient number, since it is larger than the sum of its proper divisors (116297).

78963679 is a wasteful number, since it uses less digits than its factorization.

78963679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116296.

The product of its digits is 3429216, while the sum is 55.

The square root of 78963679 is about 8886.1509665321. The cubic root of 78963679 is about 429.0182741349.

The spelling of 78963679 in words is "seventy-eight million, nine hundred sixty-three thousand, six hundred seventy-nine".