71938307 has 4 divisors (see below), whose sum is σ = 82215216. Its totient is φ = 61661400.

The previous prime is 71938297. The next prime is 71938309. The reversal of 71938307 is 70383917.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 71938307 - 2¹² = 71934211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71938309) 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, 5138444 + ... + 5138457.

It is an arithmetic number, because the mean of its divisors is an integer number (20553804).

Almost surely, 2^71938307 is an apocalyptic number.

71938307 is a deficient number, since it is larger than the sum of its proper divisors (10276909).

71938307 is a wasteful number, since it uses less digits than its factorization.

71938307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10276908.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 71938307 is about 8481.6453002940. The cubic root of 71938307 is about 415.8979097207.

The spelling of 71938307 in words is "seventy-one million, nine hundred thirty-eight thousand, three hundred seven".