78993429 has 8 divisors (see below), whose sum is σ = 107893632. Its totient is φ = 51377760.

The previous prime is 78993427. The next prime is 78993457. The reversal of 78993429 is 92439987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78993429 - 2¹ = 78993427 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78993427) 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, 320989 + ... + 321234.

It is an arithmetic number, because the mean of its divisors is an integer number (13486704).

Almost surely, 2^78993429 is an apocalyptic number.

It is an amenable number.

78993429 is a deficient number, since it is larger than the sum of its proper divisors (28900203).

78993429 is a wasteful number, since it uses less digits than its factorization.

78993429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642267.

The product of its digits is 979776, while the sum is 51.

The square root of 78993429 is about 8887.8247619989. The cubic root of 78993429 is about 429.0721457008.

The spelling of 78993429 in words is "seventy-eight million, nine hundred ninety-three thousand, four hundred twenty-nine".