78934993 has 4 divisors (see below), whose sum is σ = 79051248. Its totient is φ = 78818740.

The previous prime is 78934951. The next prime is 78934997. The reversal of 78934993 is 39943987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39943987 = 1123 ⋅35569.

It is a cyclic number.

It is not a de Polignac number, because 78934993 - 2⁹ = 78934481 is a prime.

It is a super-3 number, since 3×78934993³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78934993.

It is not an unprimeable number, because it can be changed into a prime (78934997) 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, 57103 + ... + 58468.

It is an arithmetic number, because the mean of its divisors is an integer number (19762812).

Almost surely, 2^78934993 is an apocalyptic number.

It is an amenable number.

78934993 is a deficient number, since it is larger than the sum of its proper divisors (116255).

78934993 is a wasteful number, since it uses less digits than its factorization.

78934993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116254.

The product of its digits is 1469664, while the sum is 52.

The square root of 78934993 is about 8884.5367352496. The cubic root of 78934993 is about 428.9663164545.

The spelling of 78934993 in words is "seventy-eight million, nine hundred thirty-four thousand, nine hundred ninety-three".