80140981 has 2 divisors, whose sum is σ = 80140982. Its totient is φ = 80140980.

The previous prime is 80140913. The next prime is 80140999. The reversal of 80140981 is 18904108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45684081 + 34456900 = 6759^2 + 5870^2 .

It is a cyclic number.

It is not a de Polignac number, because 80140981 - 2¹⁵ = 80108213 is a prime.

It is a super-2 number, since 2×80140981² = 12845153671284722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80120981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40070490 + 40070491.

It is an arithmetic number, because the mean of its divisors is an integer number (40070491).

Almost surely, 2^80140981 is an apocalyptic number.

It is an amenable number.

80140981 is a deficient number, since it is larger than the sum of its proper divisors (1).

80140981 is an equidigital number, since it uses as much as digits as its factorization.

80140981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 80140981 is about 8952.1495184118. The cubic root of 80140981 is about 431.1399014327.

The spelling of 80140981 in words is "eighty million, one hundred forty thousand, nine hundred eighty-one".