80711749 has 2 divisors, whose sum is σ = 80711750. Its totient is φ = 80711748.

The previous prime is 80711711. The next prime is 80711777. The reversal of 80711749 is 94711708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60730849 + 19980900 = 7793^2 + 4470^2 .

It is a cyclic number.

It is not a de Polignac number, because 80711749 - 2⁹ = 80711237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80711789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40355874 + 40355875.

It is an arithmetic number, because the mean of its divisors is an integer number (40355875).

Almost surely, 2^80711749 is an apocalyptic number.

It is an amenable number.

80711749 is a deficient number, since it is larger than the sum of its proper divisors (1).

80711749 is an equidigital number, since it uses as much as digits as its factorization.

80711749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 80711749 is about 8983.9717831258. The cubic root of 80711749 is about 432.1610142966.

The spelling of 80711749 in words is "eighty million, seven hundred eleven thousand, seven hundred forty-nine".