71845993 has 2 divisors, whose sum is σ = 71845994. Its totient is φ = 71845992.

The previous prime is 71845937. The next prime is 71846009. The reversal of 71845993 is 39954817.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65480464 + 6365529 = 8092^2 + 2523^2 .

It is a cyclic number.

It is not a de Polignac number, because 71845993 - 2⁹ = 71845481 is a prime.

It is not a weakly prime, because it can be changed into another prime (71845913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35922996 + 35922997.

It is an arithmetic number, because the mean of its divisors is an integer number (35922997).

Almost surely, 2^71845993 is an apocalyptic number.

It is an amenable number.

71845993 is a deficient number, since it is larger than the sum of its proper divisors (1).

71845993 is an equidigital number, since it uses as much as digits as its factorization.

71845993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 71845993 is about 8476.2015667397. The cubic root of 71845993 is about 415.7199348443.

The spelling of 71845993 in words is "seventy-one million, eight hundred forty-five thousand, nine hundred ninety-three".