71958813 has 8 divisors (see below), whose sum is σ = 98285376. Its totient is φ = 46802400.

The previous prime is 71958793. The next prime is 71958827. The reversal of 71958813 is 31885917.

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

It is a de Polignac number, because none of the positive numbers 2^k-71958813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71958863) 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, 292393 + ... + 292638.

It is an arithmetic number, because the mean of its divisors is an integer number (12285672).

Almost surely, 2^71958813 is an apocalyptic number.

It is an amenable number.

71958813 is a deficient number, since it is larger than the sum of its proper divisors (26326563).

71958813 is a wasteful number, since it uses less digits than its factorization.

71958813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585075.

The product of its digits is 60480, while the sum is 42.

The square root of 71958813 is about 8482.8540598079. The cubic root of 71958813 is about 415.9374231718.

It can be divided in two parts, 71958 and 813, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 71958813 in words is "seventy-one million, nine hundred fifty-eight thousand, eight hundred thirteen".