78819423 has 16 divisors (see below), whose sum is σ = 107659776. Its totient is φ = 51269760.

The previous prime is 78819407. The next prime is 78819439. The reversal of 78819423 is 32491887.

It is an interprime number because it is at equal distance from previous prime (78819407) and next prime (78819439).

It is not a de Polignac number, because 78819423 - 2⁴ = 78819407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78811423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60408 + ... + 61698.

It is an arithmetic number, because the mean of its divisors is an integer number (6728736).

Almost surely, 2^78819423 is an apocalyptic number.

78819423 is a deficient number, since it is larger than the sum of its proper divisors (28840353).

78819423 is a wasteful number, since it uses less digits than its factorization.

78819423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774.

The product of its digits is 96768, while the sum is 42.

The square root of 78819423 is about 8878.0303558841. The cubic root of 78819423 is about 428.7568620253.

The spelling of 78819423 in words is "seventy-eight million, eight hundred nineteen thousand, four hundred twenty-three".