71671930 has 24 divisors (see below), whose sum is σ = 141806196. Its totient is φ = 26062080.

The previous prime is 71671921. The next prime is 71671981. The reversal of 71671930 is 3917617.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67881121 + 3790809 = 8239^2 + 1947^2 .

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 28407 + ... + 30826.

Almost surely, 2^71671930 is an apocalyptic number.

71671930 is a deficient number, since it is larger than the sum of its proper divisors (70134266).

71671930 is a wasteful number, since it uses less digits than its factorization.

71671930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59262 (or 59251 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 71671930 is about 8465.9275924142. The cubic root of 71671930 is about 415.3839384903.

The spelling of 71671930 in words is "seventy-one million, six hundred seventy-one thousand, nine hundred thirty".