81627053 has 2 divisors, whose sum is σ = 81627054. Its totient is φ = 81627052.

The previous prime is 81627041. The next prime is 81627071. The reversal of 81627053 is 35072618.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60264169 + 21362884 = 7763^2 + 4622^2 .

It is a cyclic number.

It is not a de Polignac number, because 81627053 - 2¹⁰ = 81626029 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81623053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40813526 + 40813527.

It is an arithmetic number, because the mean of its divisors is an integer number (40813527).

Almost surely, 2^81627053 is an apocalyptic number.

It is an amenable number.

81627053 is a deficient number, since it is larger than the sum of its proper divisors (1).

81627053 is an equidigital number, since it uses as much as digits as its factorization.

81627053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 81627053 is about 9034.7691171385. The cubic root of 81627053 is about 433.7885046944.

The spelling of 81627053 in words is "eighty-one million, six hundred twenty-seven thousand, fifty-three".