71671306 has 16 divisors (see below), whose sum is σ = 129332160. Its totient is φ = 29099520.

The previous prime is 71671297. The next prime is 71671309. The reversal of 71671306 is 60317617.

It is a super-2 number, since 2×71671306² = 10273552207491272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71671309) 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 in 7 ways as a sum of consecutive naturals, for example, 134455 + ... + 134986.

It is an arithmetic number, because the mean of its divisors is an integer number (8083260).

Almost surely, 2^71671306 is an apocalyptic number.

71671306 is a deficient number, since it is larger than the sum of its proper divisors (57660854).

71671306 is a wasteful number, since it uses less digits than its factorization.

71671306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269469.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 71671306 is about 8465.8907387232. The cubic root of 71671306 is about 415.3827329959.

The spelling of 71671306 in words is "seventy-one million, six hundred seventy-one thousand, three hundred six".