78669493 has 16 divisors (see below), whose sum is σ = 92196864. Its totient is φ = 65726640.

The previous prime is 78669439. The next prime is 78669497. The reversal of 78669493 is 39496687.

It is not a de Polignac number, because 78669493 - 2⁹ = 78668981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78669493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78669497) 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 15 ways as a sum of consecutive naturals, for example, 159978 + ... + 160468.

It is an arithmetic number, because the mean of its divisors is an integer number (5762304).

Almost surely, 2^78669493 is an apocalyptic number.

It is an amenable number.

78669493 is a deficient number, since it is larger than the sum of its proper divisors (13527371).

78669493 is a wasteful number, since it uses less digits than its factorization.

78669493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032.

The product of its digits is 1959552, while the sum is 52.

The square root of 78669493 is about 8869.5824591691. The cubic root of 78669493 is about 428.4848295873.

The spelling of 78669493 in words is "seventy-eight million, six hundred sixty-nine thousand, four hundred ninety-three".