71544986 has 4 divisors (see below), whose sum is σ = 107317482. Its totient is φ = 35772492.

The previous prime is 71544929. The next prime is 71544989. The reversal of 71544986 is 68944517.

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

It can be written as a sum of positive squares in only one way, i.e., 46854025 + 24690961 = 6845^2 + 4969^2 .

It is not an unprimeable number, because it can be changed into a prime (71544989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17886245 + ... + 17886248.

Almost surely, 2^71544986 is an apocalyptic number.

71544986 is a deficient number, since it is larger than the sum of its proper divisors (35772496).

71544986 is a wasteful number, since it uses less digits than its factorization.

71544986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35772495.

The product of its digits is 241920, while the sum is 44.

The square root of 71544986 is about 8458.4269223065. The cubic root of 71544986 is about 415.1385534369.

The spelling of 71544986 in words is "seventy-one million, five hundred forty-four thousand, nine hundred eighty-six".