71438133 has 8 divisors (see below), whose sum is σ = 102577888. Its totient is φ = 43961904.

The previous prime is 71438071. The next prime is 71438149. The reversal of 71438133 is 33183417.

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

It is not a de Polignac number, because 71438133 - 2¹² = 71434037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71438133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71438533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 915835 + ... + 915912.

It is an arithmetic number, because the mean of its divisors is an integer number (12822236).

Almost surely, 2^71438133 is an apocalyptic number.

It is an amenable number.

71438133 is a deficient number, since it is larger than the sum of its proper divisors (31139755).

71438133 is a wasteful number, since it uses less digits than its factorization.

71438133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831763.

The product of its digits is 6048, while the sum is 30.

The square root of 71438133 is about 8452.1081985502. The cubic root of 71438133 is about 414.9317795637.

The spelling of 71438133 in words is "seventy-one million, four hundred thirty-eight thousand, one hundred thirty-three".