78489213 has 8 divisors (see below), whose sum is σ = 114166176. Its totient is φ = 47569200.

The previous prime is 78489181. The next prime is 78489217. The reversal of 78489213 is 31298487.

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

It is not a de Polignac number, because 78489213 - 2⁵ = 78489181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78489217) 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, 1189198 + ... + 1189263.

It is an arithmetic number, because the mean of its divisors is an integer number (14270772).

Almost surely, 2^78489213 is an apocalyptic number.

It is an amenable number.

78489213 is a deficient number, since it is larger than the sum of its proper divisors (35676963).

78489213 is a wasteful number, since it uses less digits than its factorization.

78489213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378475.

The product of its digits is 96768, while the sum is 42.

The square root of 78489213 is about 8859.4138067933. The cubic root of 78489213 is about 428.1572721725.

The spelling of 78489213 in words is "seventy-eight million, four hundred eighty-nine thousand, two hundred thirteen".