78929693 has 4 divisors (see below), whose sum is σ = 79386108. Its totient is φ = 78473280.

The previous prime is 78929687. The next prime is 78929701. The reversal of 78929693 is 39692987.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36445369 + 42484324 = 6037^2 + 6518^2 .

It is a cyclic number.

It is not a de Polignac number, because 78929693 - 2¹⁰ = 78928669 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 (78929603) 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, 227948 + ... + 228293.

It is an arithmetic number, because the mean of its divisors is an integer number (19846527).

Almost surely, 2^78929693 is an apocalyptic number.

It is an amenable number.

78929693 is a deficient number, since it is larger than the sum of its proper divisors (456415).

78929693 is a wasteful number, since it uses less digits than its factorization.

78929693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456414.

The product of its digits is 1469664, while the sum is 53.

The square root of 78929693 is about 8884.2384592040. The cubic root of 78929693 is about 428.9567154218.

The spelling of 78929693 in words is "seventy-eight million, nine hundred twenty-nine thousand, six hundred ninety-three".