78483391 has 4 divisors (see below), whose sum is σ = 89695312. Its totient is φ = 67271472.

The previous prime is 78483347. The next prime is 78483403. The reversal of 78483391 is 19338487.

It is a happy number.

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 78483391 - 2⁷ = 78483263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78483191) 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, 5605950 + ... + 5605963.

It is an arithmetic number, because the mean of its divisors is an integer number (22423828).

Almost surely, 2^78483391 is an apocalyptic number.

78483391 is a deficient number, since it is larger than the sum of its proper divisors (11211921).

78483391 is a wasteful number, since it uses less digits than its factorization.

78483391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11211920.

The product of its digits is 145152, while the sum is 43.

The square root of 78483391 is about 8859.0852236560. The cubic root of 78483391 is about 428.1466856084.

The spelling of 78483391 in words is "seventy-eight million, four hundred eighty-three thousand, three hundred ninety-one".