71727951 has 4 divisors (see below), whose sum is σ = 95637272. Its totient is φ = 47818632.

The previous prime is 71727937. The next prime is 71727959. The reversal of 71727951 is 15972717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15972717 = 3 ⋅5324239.

It is not a de Polignac number, because 71727951 - 2⁵ = 71727919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71727959) 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, 11954656 + ... + 11954661.

It is an arithmetic number, because the mean of its divisors is an integer number (23909318).

Almost surely, 2^71727951 is an apocalyptic number.

71727951 is a deficient number, since it is larger than the sum of its proper divisors (23909321).

71727951 is a wasteful number, since it uses less digits than its factorization.

71727951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23909320.

The product of its digits is 30870, while the sum is 39.

The square root of 71727951 is about 8469.2355617257. The cubic root of 71727951 is about 415.4921359550.

The spelling of 71727951 in words is "seventy-one million, seven hundred twenty-seven thousand, nine hundred fifty-one".