71891413 has 8 divisors (see below), whose sum is σ = 78503040. Its totient is φ = 65292480.

The previous prime is 71891411. The next prime is 71891431. The reversal of 71891413 is 31419817.

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

It is not a de Polignac number, because 71891413 - 2¹ = 71891411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71891411) 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, 11748 + ... + 16786.

It is an arithmetic number, because the mean of its divisors is an integer number (9812880).

Almost surely, 2^71891413 is an apocalyptic number.

It is an amenable number.

71891413 is a deficient number, since it is larger than the sum of its proper divisors (6611627).

71891413 is a wasteful number, since it uses less digits than its factorization.

71891413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6347.

The product of its digits is 6048, while the sum is 34.

The square root of 71891413 is about 8478.8804095824. The cubic root of 71891413 is about 415.8075204380.

The spelling of 71891413 in words is "seventy-one million, eight hundred ninety-one thousand, four hundred thirteen".