80198761 has 2 divisors, whose sum is σ = 80198762. Its totient is φ = 80198760.

The previous prime is 80198737. The next prime is 80198801. The reversal of 80198761 is 16789108.

It is an a-pointer prime, because the next prime (80198801) can be obtained adding 80198761 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59768361 + 20430400 = 7731^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 80198761 - 2¹¹ = 80196713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80198711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40099380 + 40099381.

It is an arithmetic number, because the mean of its divisors is an integer number (40099381).

Almost surely, 2^80198761 is an apocalyptic number.

It is an amenable number.

80198761 is a deficient number, since it is larger than the sum of its proper divisors (1).

80198761 is an equidigital number, since it uses as much as digits as its factorization.

80198761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 80198761 is about 8955.3760948382. The cubic root of 80198761 is about 431.2434908770.

The spelling of 80198761 in words is "eighty million, one hundred ninety-eight thousand, seven hundred sixty-one".