78191343 has 12 divisors (see below), whose sum is σ = 114858120. Its totient is φ = 51243696.

The previous prime is 78191339. The next prime is 78191353. The reversal of 78191343 is 34319187.

It is a happy number.

It is not a de Polignac number, because 78191343 - 2² = 78191339 is a prime.

It is a super-2 number, since 2×78191343² = 12227772240287298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78191298 and 78191307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78191303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73096 + ... + 74157.

It is an arithmetic number, because the mean of its divisors is an integer number (9571510).

Almost surely, 2^78191343 is an apocalyptic number.

78191343 is a deficient number, since it is larger than the sum of its proper divisors (36666777).

78191343 is a wasteful number, since it uses less digits than its factorization.

78191343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147318 (or 147315 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 78191343 is about 8842.5868952473. The cubic root of 78191343 is about 427.6149603622.

The spelling of 78191343 in words is "seventy-eight million, one hundred ninety-one thousand, three hundred forty-three".