81067453 has 2 divisors, whose sum is σ = 81067454. Its totient is φ = 81067452.

The previous prime is 81067423. The next prime is 81067477. The reversal of 81067453 is 35476018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45522009 + 35545444 = 6747^2 + 5962^2 .

It is a cyclic number.

It is not a de Polignac number, because 81067453 - 2⁹ = 81066941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81067403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40533726 + 40533727.

It is an arithmetic number, because the mean of its divisors is an integer number (40533727).

Almost surely, 2^81067453 is an apocalyptic number.

It is an amenable number.

81067453 is a deficient number, since it is larger than the sum of its proper divisors (1).

81067453 is an equidigital number, since it uses as much as digits as its factorization.

81067453 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 81067453 is about 9003.7466090511. The cubic root of 81067453 is about 432.7949415468.

The spelling of 81067453 in words is "eighty-one million, sixty-seven thousand, four hundred fifty-three".