71691814 has 8 divisors (see below), whose sum is σ = 108746280. Its totient is φ = 35443056.

The previous prime is 71691791. The next prime is 71691877. The reversal of 71691814 is 41819617.

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

It is a super-2 number, since 2×71691814² = 10279432389221192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 201204 + ... + 201559.

It is an arithmetic number, because the mean of its divisors is an integer number (13593285).

Almost surely, 2^71691814 is an apocalyptic number.

71691814 is a deficient number, since it is larger than the sum of its proper divisors (37054466).

71691814 is a wasteful number, since it uses less digits than its factorization.

71691814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402854.

The product of its digits is 12096, while the sum is 37.

The square root of 71691814 is about 8467.1018654555. The cubic root of 71691814 is about 415.4223483696.

The spelling of 71691814 in words is "seventy-one million, six hundred ninety-one thousand, eight hundred fourteen".