78305943 has 4 divisors (see below), whose sum is σ = 104407928. Its totient is φ = 52203960.

The previous prime is 78305939. The next prime is 78305947. The reversal of 78305943 is 34950387.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78305939) and next prime (78305947).

It is not a de Polignac number, because 78305943 - 2² = 78305939 is a prime.

It is a super-2 number, since 2×78305943² = 12263641418238498, 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 (78305947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13050988 + ... + 13050993.

It is an arithmetic number, because the mean of its divisors is an integer number (26101982).

Almost surely, 2^78305943 is an apocalyptic number.

78305943 is a deficient number, since it is larger than the sum of its proper divisors (26101985).

78305943 is a wasteful number, since it uses less digits than its factorization.

78305943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26101984.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 78305943 is about 8849.0645268299. The cubic root of 78305943 is about 427.8237675910.

The spelling of 78305943 in words is "seventy-eight million, three hundred five thousand, nine hundred forty-three".