78501493 has 4 divisors (see below), whose sum is σ = 89716000. Its totient is φ = 67286988.

The previous prime is 78501491. The next prime is 78501497. The reversal of 78501493 is 39410587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78501493 - 2¹ = 78501491 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 (78501491) 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, 5607243 + ... + 5607256.

It is an arithmetic number, because the mean of its divisors is an integer number (22429000).

Almost surely, 2^78501493 is an apocalyptic number.

It is an amenable number.

78501493 is a deficient number, since it is larger than the sum of its proper divisors (11214507).

78501493 is a wasteful number, since it uses less digits than its factorization.

78501493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11214506.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 78501493 is about 8860.1068277984. The cubic root of 78501493 is about 428.1796000693.

The spelling of 78501493 in words is "seventy-eight million, five hundred one thousand, four hundred ninety-three".