80751997 has 2 divisors, whose sum is σ = 80751998. Its totient is φ = 80751996.

The previous prime is 80751991. The next prime is 80752027. The reversal of 80751997 is 79915708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80658361 + 93636 = 8981^2 + 306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80751997 is a 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 (80751991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40375998 + 40375999.

It is an arithmetic number, because the mean of its divisors is an integer number (40375999).

Almost surely, 2^80751997 is an apocalyptic number.

It is an amenable number.

80751997 is a deficient number, since it is larger than the sum of its proper divisors (1).

80751997 is an equidigital number, since it uses as much as digits as its factorization.

80751997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 80751997 is about 8986.2114931711. The cubic root of 80751997 is about 432.2328366617.

The spelling of 80751997 in words is "eighty million, seven hundred fifty-one thousand, nine hundred ninety-seven".