80072071 has 2 divisors, whose sum is σ = 80072072. Its totient is φ = 80072070.

The previous prime is 80072051. The next prime is 80072089. The reversal of 80072071 is 17027008.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80072071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80072011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40036035 + 40036036.

It is an arithmetic number, because the mean of its divisors is an integer number (40036036).

Almost surely, 2^80072071 is an apocalyptic number.

80072071 is a deficient number, since it is larger than the sum of its proper divisors (1).

80072071 is an equidigital number, since it uses as much as digits as its factorization.

80072071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 80072071 is about 8948.2998943933. The cubic root of 80072071 is about 431.0162927216.

Adding to 80072071 its reverse (17027008), we get a palindrome (97099079).

The spelling of 80072071 in words is "eighty million, seventy-two thousand, seventy-one".