71982793 has 2 divisors, whose sum is σ = 71982794. Its totient is φ = 71982792.

The previous prime is 71982791. The next prime is 71982931. The reversal of 71982793 is 39728917.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51079609 + 20903184 = 7147^2 + 4572^2 .

It is an emirp because it is prime and its reverse (39728917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71982793 - 2¹ = 71982791 is a prime.

Together with 71982791, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71982791) 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, 35991396 + 35991397.

It is an arithmetic number, because the mean of its divisors is an integer number (35991397).

Almost surely, 2^71982793 is an apocalyptic number.

It is an amenable number.

71982793 is a deficient number, since it is larger than the sum of its proper divisors (1).

71982793 is an equidigital number, since it uses as much as digits as its factorization.

71982793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 71982793 is about 8484.2673814537. The cubic root of 71982793 is about 415.9836212271.

The spelling of 71982793 in words is "seventy-one million, nine hundred eighty-two thousand, seven hundred ninety-three".