71893147 has 4 divisors (see below), whose sum is σ = 75018960. Its totient is φ = 68767336.

The previous prime is 71893121. The next prime is 71893181. The reversal of 71893147 is 74139817.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71893147 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71899147) 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, 1562872 + ... + 1562917.

It is an arithmetic number, because the mean of its divisors is an integer number (18754740).

Almost surely, 2^71893147 is an apocalyptic number.

71893147 is a deficient number, since it is larger than the sum of its proper divisors (3125813).

71893147 is a wasteful number, since it uses less digits than its factorization.

71893147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125812.

The product of its digits is 42336, while the sum is 40.

The square root of 71893147 is about 8478.9826630322. The cubic root of 71893147 is about 415.8108634633.

The spelling of 71893147 in words is "seventy-one million, eight hundred ninety-three thousand, one hundred forty-seven".