78532493 has 8 divisors (see below), whose sum is σ = 87490200. Its totient is φ = 69991488.

The previous prime is 78532477. The next prime is 78532541. The reversal of 78532493 is 39423587.

It can be written as a sum of positive squares in 4 ways, for example, as 5207524 + 73324969 = 2282^2 + 8563^2 .

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 78532493 - 2⁴ = 78532477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78532493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78532793) 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, 103778 + ... + 104531.

It is an arithmetic number, because the mean of its divisors is an integer number (10936275).

Almost surely, 2^78532493 is an apocalyptic number.

It is an amenable number.

78532493 is a deficient number, since it is larger than the sum of its proper divisors (8957707).

78532493 is a wasteful number, since it uses less digits than its factorization.

78532493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208351.

The product of its digits is 181440, while the sum is 41.

The square root of 78532493 is about 8861.8560696956. The cubic root of 78532493 is about 428.2359549242.

The spelling of 78532493 in words is "seventy-eight million, five hundred thirty-two thousand, four hundred ninety-three".