78432583 has 4 divisors (see below), whose sum is σ = 78513840. Its totient is φ = 78351328.

The previous prime is 78432581. The next prime is 78432619. The reversal of 78432583 is 38523487.

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 78432583 - 2¹ = 78432581 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 (78432581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39163 + ... + 41116.

It is an arithmetic number, because the mean of its divisors is an integer number (19628460).

Almost surely, 2^78432583 is an apocalyptic number.

78432583 is a deficient number, since it is larger than the sum of its proper divisors (81257).

78432583 is an equidigital number, since it uses as much as digits as its factorization.

78432583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81256.

The product of its digits is 161280, while the sum is 40.

The square root of 78432583 is about 8856.2171947169. The cubic root of 78432583 is about 428.0542755142.

The spelling of 78432583 in words is "seventy-eight million, four hundred thirty-two thousand, five hundred eighty-three".