71397833 has 4 divisors (see below), whose sum is σ = 76889988. Its totient is φ = 65905680.

The previous prime is 71397829. The next prime is 71397857. The reversal of 71397833 is 33879317.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14047504 + 57350329 = 3748^2 + 7573^2 .

It is a cyclic number.

It is not a de Polignac number, because 71397833 - 2² = 71397829 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71397863) 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 3 ways as a sum of consecutive naturals, for example, 2746058 + ... + 2746083.

It is an arithmetic number, because the mean of its divisors is an integer number (19222497).

Almost surely, 2^71397833 is an apocalyptic number.

It is an amenable number.

71397833 is a deficient number, since it is larger than the sum of its proper divisors (5492155).

71397833 is a wasteful number, since it uses less digits than its factorization.

71397833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5492154.

The product of its digits is 95256, while the sum is 41.

The square root of 71397833 is about 8449.7238416412. The cubic root of 71397833 is about 414.8537404951.

The spelling of 71397833 in words is "seventy-one million, three hundred ninety-seven thousand, eight hundred thirty-three".