80978941 has 2 divisors, whose sum is σ = 80978942. Its totient is φ = 80978940.

The previous prime is 80978927. The next prime is 80978957. The reversal of 80978941 is 14987908.

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., 69655716 + 11323225 = 8346^2 + 3365^2 .

It is a cyclic number.

It is not a de Polignac number, because 80978941 - 2¹¹ = 80976893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80978891 and 80978900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80978921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40489470 + 40489471.

It is an arithmetic number, because the mean of its divisors is an integer number (40489471).

Almost surely, 2^80978941 is an apocalyptic number.

It is an amenable number.

80978941 is a deficient number, since it is larger than the sum of its proper divisors (1).

80978941 is an equidigital number, since it uses as much as digits as its factorization.

80978941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 80978941 is about 8998.8299795029. The cubic root of 80978941 is about 432.6373711339.

The spelling of 80978941 in words is "eighty million, nine hundred seventy-eight thousand, nine hundred forty-one".