80149681 has 2 divisors, whose sum is σ = 80149682. Its totient is φ = 80149680.

The previous prime is 80149637. The next prime is 80149703. The reversal of 80149681 is 18694108.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66341025 + 13808656 = 8145^2 + 3716^2 .

It is a cyclic number.

It is not a de Polignac number, because 80149681 - 2¹⁵ = 80116913 is a prime.

It is a super-2 number, since 2×80149681² = 12847942728803522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80149681.

It is not a weakly prime, because it can be changed into another prime (80149631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40074840 + 40074841.

It is an arithmetic number, because the mean of its divisors is an integer number (40074841).

Almost surely, 2^80149681 is an apocalyptic number.

It is an amenable number.

80149681 is a deficient number, since it is larger than the sum of its proper divisors (1).

80149681 is an equidigital number, since it uses as much as digits as its factorization.

80149681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 80149681 is about 8952.6354220419. The cubic root of 80149681 is about 431.1555021960.

The spelling of 80149681 in words is "eighty million, one hundred forty-nine thousand, six hundred eighty-one".