71734979 has 4 divisors (see below), whose sum is σ = 72541080. Its totient is φ = 70928880.

The previous prime is 71734939. The next prime is 71734997. The reversal of 71734979 is 97943717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97943717 = 59 ⋅1660063.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71734979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71734909) 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, 402917 + ... + 403094.

It is an arithmetic number, because the mean of its divisors is an integer number (18135270).

Almost surely, 2^71734979 is an apocalyptic number.

71734979 is a deficient number, since it is larger than the sum of its proper divisors (806101).

71734979 is an equidigital number, since it uses as much as digits as its factorization.

71734979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806100.

The product of its digits is 333396, while the sum is 47.

The square root of 71734979 is about 8469.6504650428. The cubic root of 71734979 is about 415.5057056691.

The spelling of 71734979 in words is "seventy-one million, seven hundred thirty-four thousand, nine hundred seventy-nine".