78872743 has 4 divisors (see below), whose sum is σ = 83023960. Its totient is φ = 74721528.

The previous prime is 78872723. The next prime is 78872747. The reversal of 78872743 is 34727887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34727887 = 457 ⋅75991.

It is not a de Polignac number, because 78872743 - 2¹³ = 78864551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78872693 and 78872702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78872747) 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, 2075580 + ... + 2075617.

It is an arithmetic number, because the mean of its divisors is an integer number (20755990).

Almost surely, 2^78872743 is an apocalyptic number.

78872743 is a deficient number, since it is larger than the sum of its proper divisors (4151217).

78872743 is a wasteful number, since it uses less digits than its factorization.

78872743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4151216.

The product of its digits is 526848, while the sum is 46.

The square root of 78872743 is about 8881.0327665199. The cubic root of 78872743 is about 428.8535224754.

The spelling of 78872743 in words is "seventy-eight million, eight hundred seventy-two thousand, seven hundred forty-three".