79431943 has 4 divisors (see below), whose sum is σ = 80734168. Its totient is φ = 78129720.

The previous prime is 79431941. The next prime is 79431953. The reversal of 79431943 is 34913497.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 79431943 - 2¹ = 79431941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79431896 and 79431905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79431941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651021 + ... + 651142.

It is an arithmetic number, because the mean of its divisors is an integer number (20183542).

Almost surely, 2^79431943 is an apocalyptic number.

79431943 is a deficient number, since it is larger than the sum of its proper divisors (1302225).

79431943 is a wasteful number, since it uses less digits than its factorization.

79431943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302224.

The product of its digits is 81648, while the sum is 40.

The square root of 79431943 is about 8912.4599858849. The cubic root of 79431943 is about 429.8646464195.

The spelling of 79431943 in words is "seventy-nine million, four hundred thirty-one thousand, nine hundred forty-three".