71983807 has 4 divisors (see below), whose sum is σ = 82267216. Its totient is φ = 61700400.

The previous prime is 71983787. The next prime is 71983853. The reversal of 71983807 is 70838917.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70838917 = 47 ⋅1507211.

It is a cyclic number.

It is not a de Polignac number, because 71983807 - 2⁷ = 71983679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71983007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5141694 + ... + 5141707.

It is an arithmetic number, because the mean of its divisors is an integer number (20566804).

Almost surely, 2^71983807 is an apocalyptic number.

71983807 is a deficient number, since it is larger than the sum of its proper divisors (10283409).

71983807 is a wasteful number, since it uses less digits than its factorization.

71983807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10283408.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 71983807 is about 8484.3271389074. The cubic root of 71983807 is about 415.9855744967.

The spelling of 71983807 in words is "seventy-one million, nine hundred eighty-three thousand, eight hundred seven".