71984953 has 4 divisors (see below), whose sum is σ = 76219380. Its totient is φ = 67750528.

The previous prime is 71984933. The next prime is 71984959. The reversal of 71984953 is 35948917.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65157184 + 6827769 = 8072^2 + 2613^2 .

It is a cyclic number.

It is not a de Polignac number, because 71984953 - 2⁵ = 71984921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71984959) 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 3 ways as a sum of consecutive naturals, for example, 2117188 + ... + 2117221.

It is an arithmetic number, because the mean of its divisors is an integer number (19054845).

Almost surely, 2^71984953 is an apocalyptic number.

It is an amenable number.

71984953 is a deficient number, since it is larger than the sum of its proper divisors (4234427).

71984953 is a wasteful number, since it uses less digits than its factorization.

71984953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4234426.

The product of its digits is 272160, while the sum is 46.

The square root of 71984953 is about 8484.3946749311. The cubic root of 71984953 is about 415.9877820160.

The spelling of 71984953 in words is "seventy-one million, nine hundred eighty-four thousand, nine hundred fifty-three".