72071711 has 2 divisors, whose sum is σ = 72071712. Its totient is φ = 72071710.

The previous prime is 72071677. The next prime is 72071729. The reversal of 72071711 is 11717027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72071711 - 2⁶ = 72071647 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72071761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035855 + 36035856.

It is an arithmetic number, because the mean of its divisors is an integer number (36035856).

Almost surely, 2^72071711 is an apocalyptic number.

72071711 is a deficient number, since it is larger than the sum of its proper divisors (1).

72071711 is an equidigital number, since it uses as much as digits as its factorization.

72071711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 686, while the sum is 26.

The square root of 72071711 is about 8489.5059337985. The cubic root of 72071711 is about 416.1548344218.

Adding to 72071711 its reverse (11717027), we get a palindrome (83788738).

The spelling of 72071711 in words is "seventy-two million, seventy-one thousand, seven hundred eleven".