71964381 has 16 divisors (see below), whose sum is σ = 101384640. Its totient is φ = 45279360.

The previous prime is 71964359. The next prime is 71964437. The reversal of 71964381 is 18346917.

It is not a de Polignac number, because 71964381 - 2⁶ = 71964317 is a prime.

It is a super-2 number, since 2×71964381² = 10357744265426322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71960381) 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, 13771 + ... + 18263.

It is an arithmetic number, because the mean of its divisors is an integer number (6336540).

Almost surely, 2^71964381 is an apocalyptic number.

It is an amenable number.

71964381 is a deficient number, since it is larger than the sum of its proper divisors (29420259).

71964381 is a wasteful number, since it uses less digits than its factorization.

71964381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4796.

The product of its digits is 36288, while the sum is 39.

The square root of 71964381 is about 8483.1822448890. The cubic root of 71964381 is about 415.9481509745.

The spelling of 71964381 in words is "seventy-one million, nine hundred sixty-four thousand, three hundred eighty-one".