78775213 has 8 divisors (see below), whose sum is σ = 86021280. Its totient is φ = 71543280.

The previous prime is 78775211. The next prime is 78775231. The reversal of 78775213 is 31257787.

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 78775213 - 2¹ = 78775211 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 (78775211) 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, 10606 + ... + 16432.

It is an arithmetic number, because the mean of its divisors is an integer number (10752660).

Almost surely, 2^78775213 is an apocalyptic number.

It is an amenable number.

78775213 is a deficient number, since it is larger than the sum of its proper divisors (7246067).

78775213 is a wasteful number, since it uses less digits than its factorization.

78775213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067.

The product of its digits is 82320, while the sum is 40.

The square root of 78775213 is about 8875.5401525766. The cubic root of 78775213 is about 428.6766834547.

The spelling of 78775213 in words is "seventy-eight million, seven hundred seventy-five thousand, two hundred thirteen".