71974847 has 4 divisors (see below), whose sum is σ = 82256976. Its totient is φ = 61692720.

The previous prime is 71974823. The next prime is 71974853. The reversal of 71974847 is 74847917.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74847917 = 457 ⋅163781.

It is a cyclic number.

It is not a de Polignac number, because 71974847 - 2⁶ = 71974783 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 (71974247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5141054 + ... + 5141067.

It is an arithmetic number, because the mean of its divisors is an integer number (20564244).

Almost surely, 2^71974847 is an apocalyptic number.

71974847 is a deficient number, since it is larger than the sum of its proper divisors (10282129).

71974847 is a wasteful number, since it uses less digits than its factorization.

71974847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10282128.

The product of its digits is 395136, while the sum is 47.

The square root of 71974847 is about 8483.7990900304. The cubic root of 71974847 is about 415.9683142009.

The spelling of 71974847 in words is "seventy-one million, nine hundred seventy-four thousand, eight hundred forty-seven".