71686073 has 8 divisors (see below), whose sum is σ = 73696896. Its totient is φ = 69703200.

The previous prime is 71686067. The next prime is 71686103. The reversal of 71686073 is 37068617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71686073 - 2¹² = 71681977 is a prime.

It is a super-2 number, since 2×71686073² = 10277786124322658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71686673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1733 + ... + 12098.

It is an arithmetic number, because the mean of its divisors is an integer number (9212112).

Almost surely, 2^71686073 is an apocalyptic number.

71686073 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

71686073 is a deficient number, since it is larger than the sum of its proper divisors (2010823).

71686073 is a wasteful number, since it uses less digits than its factorization.

71686073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13975.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 71686073 is about 8466.7628406611. The cubic root of 71686073 is about 415.4112592218.

It can be divided in two parts, 7 and 1686073, that multiplied together give a triangular number (11802511 = T₄₈₅₈).

The spelling of 71686073 in words is "seventy-one million, six hundred eighty-six thousand, seventy-three".