71868619 has 4 divisors (see below), whose sum is σ = 71989200. Its totient is φ = 71748040.

The previous prime is 71868611. The next prime is 71868637. The reversal of 71868619 is 91686817.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71868619 - 2³ = 71868611 is a prime.

It is a super-2 number, since 2×71868619² = 10330196793934322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71868611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59392 + ... + 60589.

It is an arithmetic number, because the mean of its divisors is an integer number (17997300).

Almost surely, 2^71868619 is an apocalyptic number.

71868619 is a deficient number, since it is larger than the sum of its proper divisors (120581).

71868619 is a wasteful number, since it uses less digits than its factorization.

71868619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120580.

The product of its digits is 145152, while the sum is 46.

The square root of 71868619 is about 8477.5361397047. The cubic root of 71868619 is about 415.7635702725.

The spelling of 71868619 in words is "seventy-one million, eight hundred sixty-eight thousand, six hundred nineteen".