71999641 has 8 divisors (see below), whose sum is σ = 87125760. Its totient is φ = 58083648.

The previous prime is 71999597. The next prime is 71999651. The reversal of 71999641 is 14699917.

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

It is not a de Polignac number, because 71999641 - 2⁷ = 71999513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71999591 and 71999600.

It is not an unprimeable number, because it can be changed into a prime (71999651) 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, 302401 + ... + 302638.

It is an arithmetic number, because the mean of its divisors is an integer number (10890720).

Almost surely, 2^71999641 is an apocalyptic number.

It is an amenable number.

71999641 is a deficient number, since it is larger than the sum of its proper divisors (15126119).

71999641 is a wasteful number, since it uses less digits than its factorization.

71999641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605063.

The product of its digits is 122472, while the sum is 46.

The square root of 71999641 is about 8485.2602199343. The cubic root of 71999641 is about 416.0160731740.

The spelling of 71999641 in words is "seventy-one million, nine hundred ninety-nine thousand, six hundred forty-one".