81760453 has 2 divisors, whose sum is σ = 81760454. Its totient is φ = 81760452.

The previous prime is 81760433. The next prime is 81760493. The reversal of 81760453 is 35406718.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49871844 + 31888609 = 7062^2 + 5647^2 .

It is a cyclic number.

It is not a de Polignac number, because 81760453 - 2⁵ = 81760421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81760403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40880226 + 40880227.

It is an arithmetic number, because the mean of its divisors is an integer number (40880227).

Almost surely, 2^81760453 is an apocalyptic number.

It is an amenable number.

81760453 is a deficient number, since it is larger than the sum of its proper divisors (1).

81760453 is an equidigital number, since it uses as much as digits as its factorization.

81760453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 81760453 is about 9042.1486937564. The cubic root of 81760453 is about 434.0246841206.

The spelling of 81760453 in words is "eighty-one million, seven hundred sixty thousand, four hundred fifty-three".