78873959 has 4 divisors (see below), whose sum is σ = 83025240. Its totient is φ = 74722680.

The previous prime is 78873953. The next prime is 78873979. The reversal of 78873959 is 95937887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95937887 = 29 ⋅3308203.

It is a cyclic number.

It is not a de Polignac number, because 78873959 - 2¹² = 78869863 is a prime.

It is a super-2 number, since 2×78873959² = 12442202816667362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78873953) 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, 2075612 + ... + 2075649.

It is an arithmetic number, because the mean of its divisors is an integer number (20756310).

Almost surely, 2^78873959 is an apocalyptic number.

78873959 is a deficient number, since it is larger than the sum of its proper divisors (4151281).

78873959 is a wasteful number, since it uses less digits than its factorization.

78873959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4151280.

The product of its digits is 3810240, while the sum is 56.

The square root of 78873959 is about 8881.1012267624. The cubic root of 78873959 is about 428.8557263766.

It can be divided in two parts, 788 and 73959, that added together give a palindrome (74747).

The spelling of 78873959 in words is "seventy-eight million, eight hundred seventy-three thousand, nine hundred fifty-nine".