71936993 has 2 divisors, whose sum is σ = 71936994. Its totient is φ = 71936992.

The previous prime is 71936959. The next prime is 71936999. The reversal of 71936993 is 39963917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43335889 + 28601104 = 6583^2 + 5348^2 .

It is a cyclic number.

It is not a de Polignac number, because 71936993 - 2²⁶ = 4828129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (71936999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35968496 + 35968497.

It is an arithmetic number, because the mean of its divisors is an integer number (35968497).

Almost surely, 2^71936993 is an apocalyptic number.

It is an amenable number.

71936993 is a deficient number, since it is larger than the sum of its proper divisors (1).

71936993 is an equidigital number, since it uses as much as digits as its factorization.

71936993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 47.

The square root of 71936993 is about 8481.5678385544. The cubic root of 71936993 is about 415.8953774899.

The spelling of 71936993 in words is "seventy-one million, nine hundred thirty-six thousand, nine hundred ninety-three".