71989367 has 4 divisors (see below), whose sum is σ = 72448056. Its totient is φ = 71530680.

The previous prime is 71989349. The next prime is 71989369. The reversal of 71989367 is 76398917.

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 71989367 - 2⁸ = 71989111 is a prime.

It is a super-2 number, since 2×71989367² = 10364937922121378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71989369) 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, 229109 + ... + 229422.

It is an arithmetic number, because the mean of its divisors is an integer number (18112014).

Almost surely, 2^71989367 is an apocalyptic number.

71989367 is a deficient number, since it is larger than the sum of its proper divisors (458689).

71989367 is a wasteful number, since it uses less digits than its factorization.

71989367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458688.

The product of its digits is 571536, while the sum is 50.

The square root of 71989367 is about 8484.6547955706. The cubic root of 71989367 is about 415.9962844065.

The spelling of 71989367 in words is "seventy-one million, nine hundred eighty-nine thousand, three hundred sixty-seven".