80638997 has 2 divisors, whose sum is σ = 80638998. Its totient is φ = 80638996.

The previous prime is 80638927. The next prime is 80639003. The reversal of 80638997 is 79983608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72607441 + 8031556 = 8521^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 80638997 - 2⁸ = 80638741 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 (80638927) 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, 40319498 + 40319499.

It is an arithmetic number, because the mean of its divisors is an integer number (40319499).

Almost surely, 2^80638997 is an apocalyptic number.

It is an amenable number.

80638997 is a deficient number, since it is larger than the sum of its proper divisors (1).

80638997 is an equidigital number, since it uses as much as digits as its factorization.

80638997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 80638997 is about 8979.9218816201. The cubic root of 80638997 is about 432.0311280868.

The spelling of 80638997 in words is "eighty million, six hundred thirty-eight thousand, nine hundred ninety-seven".