78393269 has 8 divisors (see below), whose sum is σ = 84013440. Its totient is φ = 72957456.

The previous prime is 78393253. The next prime is 78393281. The reversal of 78393269 is 96239387.

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 78393269 - 2⁴ = 78393253 is a prime.

It is a super-2 number, since 2×78393269² = 12291009249012722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78393299) 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, 45209 + ... + 46910.

It is an arithmetic number, because the mean of its divisors is an integer number (10501680).

Almost surely, 2^78393269 is an apocalyptic number.

It is an amenable number.

78393269 is a deficient number, since it is larger than the sum of its proper divisors (5620171).

78393269 is a wasteful number, since it uses less digits than its factorization.

78393269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92179.

The product of its digits is 489888, while the sum is 47.

The square root of 78393269 is about 8853.9973458320. The cubic root of 78393269 is about 427.9827434304.

Adding to 78393269 its sum of digits (47), we get a square (78393316 = 8854²).

The spelling of 78393269 in words is "seventy-eight million, three hundred ninety-three thousand, two hundred sixty-nine".