78870493 has 8 divisors (see below), whose sum is σ = 85083768. Its totient is φ = 72678144.

The previous prime is 78870481. The next prime is 78870509. The reversal of 78870493 is 39407887.

It can be written as a sum of positive squares in 4 ways, for example, as 777924 + 78092569 = 882^2 + 8837^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 78870493 - 2⁵ = 78870461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78870403) 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, 3105 + ... + 12937.

It is an arithmetic number, because the mean of its divisors is an integer number (10635471).

Almost surely, 2^78870493 is an apocalyptic number.

It is an amenable number.

78870493 is a deficient number, since it is larger than the sum of its proper divisors (6213275).

78870493 is a wasteful number, since it uses less digits than its factorization.

78870493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10463.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 78870493 is about 8880.9060911598. The cubic root of 78870493 is about 428.8494444735.

The spelling of 78870493 in words is "seventy-eight million, eight hundred seventy thousand, four hundred ninety-three".