80978201 has 2 divisors, whose sum is σ = 80978202. Its totient is φ = 80978200.

The previous prime is 80978189. The next prime is 80978221. The reversal of 80978201 is 10287908.

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., 77862976 + 3115225 = 8824^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 80978201 - 2¹⁸ = 80716057 is a prime.

It is not a weakly prime, because it can be changed into another prime (80978221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40489100 + 40489101.

It is an arithmetic number, because the mean of its divisors is an integer number (40489101).

Almost surely, 2^80978201 is an apocalyptic number.

It is an amenable number.

80978201 is a deficient number, since it is larger than the sum of its proper divisors (1).

80978201 is an equidigital number, since it uses as much as digits as its factorization.

80978201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 80978201 is about 8998.7888629526. The cubic root of 80978201 is about 432.6360532908.

The spelling of 80978201 in words is "eighty million, nine hundred seventy-eight thousand, two hundred one".