71673979 has 16 divisors (see below), whose sum is σ = 78829632. Its totient is φ = 64770048.

The previous prime is 71673913. The next prime is 71673997. The reversal of 71673979 is 97937617.

It is a cyclic number.

It is not a de Polignac number, because 71673979 - 2⁷ = 71673851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71653979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142242 + ... + 142744.

It is an arithmetic number, because the mean of its divisors is an integer number (4926852).

Almost surely, 2^71673979 is an apocalyptic number.

71673979 is a deficient number, since it is larger than the sum of its proper divisors (7155653).

71673979 is a wasteful number, since it uses less digits than its factorization.

71673979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726.

The product of its digits is 500094, while the sum is 49.

The square root of 71673979 is about 8466.0486060499. The cubic root of 71673979 is about 415.3878968674.

The spelling of 71673979 in words is "seventy-one million, six hundred seventy-three thousand, nine hundred seventy-nine".