78860013 has 8 divisors (see below), whose sum is σ = 110680800. Its totient is φ = 49806288.

The previous prime is 78860009. The next prime is 78860017. The reversal of 78860013 is 31006887.

It is an interprime number because it is at equal distance from previous prime (78860009) and next prime (78860017).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78860013 - 2² = 78860009 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78860017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691698 + ... + 691811.

It is an arithmetic number, because the mean of its divisors is an integer number (13835100).

Almost surely, 2^78860013 is an apocalyptic number.

It is an amenable number.

78860013 is a deficient number, since it is larger than the sum of its proper divisors (31820787).

78860013 is a wasteful number, since it uses less digits than its factorization.

78860013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383531.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 78860013 is about 8880.3160416733. The cubic root of 78860013 is about 428.8304490246.

The spelling of 78860013 in words is "seventy-eight million, eight hundred sixty thousand, thirteen".