78862039 has 4 divisors (see below), whose sum is σ = 80350056. Its totient is φ = 77374024.

The previous prime is 78862033. The next prime is 78862051. The reversal of 78862039 is 93026887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93026887 = 67 ⋅1388461.

It is a cyclic number.

It is not a de Polignac number, because 78862039 - 2²⁵ = 45307607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78861986 and 78862004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78862033) 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, 743929 + ... + 744034.

It is an arithmetic number, because the mean of its divisors is an integer number (20087514).

Almost surely, 2^78862039 is an apocalyptic number.

78862039 is a deficient number, since it is larger than the sum of its proper divisors (1488017).

78862039 is a wasteful number, since it uses less digits than its factorization.

78862039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488016.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 78862039 is about 8880.4301134573. The cubic root of 78862039 is about 428.8341213676.

The spelling of 78862039 in words is "seventy-eight million, eight hundred sixty-two thousand, thirty-nine".