71378813 has 8 divisors (see below), whose sum is σ = 78265440. Its totient is φ = 64558480.

The previous prime is 71378803. The next prime is 71378819. The reversal of 71378813 is 31887317.

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 71378813 - 2²⁶ = 4269949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71378819) 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, 14303 + ... + 18636.

It is an arithmetic number, because the mean of its divisors is an integer number (9783180).

Almost surely, 2^71378813 is an apocalyptic number.

It is an amenable number.

71378813 is a deficient number, since it is larger than the sum of its proper divisors (6886627).

71378813 is a wasteful number, since it uses less digits than its factorization.

71378813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33147.

The product of its digits is 28224, while the sum is 38.

The square root of 71378813 is about 8448.5982861064. The cubic root of 71378813 is about 414.8168989525.

The spelling of 71378813 in words is "seventy-one million, three hundred seventy-eight thousand, eight hundred thirteen".