78870371 has 4 divisors (see below), whose sum is σ = 80548512. Its totient is φ = 77192232.

The previous prime is 78870359. The next prime is 78870373. The reversal of 78870371 is 17307887.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78870371 - 2¹⁰ = 78869347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78870373) 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, 839000 + ... + 839093.

It is an arithmetic number, because the mean of its divisors is an integer number (20137128).

Almost surely, 2^78870371 is an apocalyptic number.

78870371 is a deficient number, since it is larger than the sum of its proper divisors (1678141).

78870371 is a wasteful number, since it uses less digits than its factorization.

78870371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678140.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 78870371 is about 8880.8992224887. The cubic root of 78870371 is about 428.8492233529.

The spelling of 78870371 in words is "seventy-eight million, eight hundred seventy thousand, three hundred seventy-one".