71868919 has 8 divisors (see below), whose sum is σ = 73630208. Its totient is φ = 70126560.

The previous prime is 71868913. The next prime is 71868947. The reversal of 71868919 is 91986817.

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 71868919 - 2¹³ = 71860727 is a prime.

It is a super-2 number, since 2×71868919² = 10330283036457122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71868913) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3109 + ... + 12385.

It is an arithmetic number, because the mean of its divisors is an integer number (9203776).

Almost surely, 2^71868919 is an apocalyptic number.

71868919 is a deficient number, since it is larger than the sum of its proper divisors (1761289).

71868919 is a wasteful number, since it uses less digits than its factorization.

71868919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9465.

The product of its digits is 217728, while the sum is 49.

The square root of 71868919 is about 8477.5538335065. The cubic root of 71868919 is about 415.7641487767.

The spelling of 71868919 in words is "seventy-one million, eight hundred sixty-eight thousand, nine hundred nineteen".