71968147 has 4 divisors (see below), whose sum is σ = 72175896. Its totient is φ = 71760400.

The previous prime is 71968129. The next prime is 71968153. The reversal of 71968147 is 74186917.

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 71968147 - 2¹¹ = 71966099 is a prime.

It is a super-2 number, since 2×71968147² = 10358828365227218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71948147) 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, 103354 + ... + 104047.

It is an arithmetic number, because the mean of its divisors is an integer number (18043974).

Almost surely, 2^71968147 is an apocalyptic number.

71968147 is a deficient number, since it is larger than the sum of its proper divisors (207749).

71968147 is a wasteful number, since it uses less digits than its factorization.

71968147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207748.

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

The square root of 71968147 is about 8483.4042105749. The cubic root of 71968147 is about 415.9554065704.

The spelling of 71968147 in words is "seventy-one million, nine hundred sixty-eight thousand, one hundred forty-seven".