81452953 has 2 divisors, whose sum is σ = 81452954. Its totient is φ = 81452952.

The previous prime is 81452951. The next prime is 81452971. The reversal of 81452953 is 35925418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80946009 + 506944 = 8997^2 + 712^2 .

It is a cyclic number.

It is not a de Polignac number, because 81452953 - 2¹ = 81452951 is a prime.

Together with 81452951, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (81452951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40726476 + 40726477.

It is an arithmetic number, because the mean of its divisors is an integer number (40726477).

Almost surely, 2^81452953 is an apocalyptic number.

It is an amenable number.

81452953 is a deficient number, since it is larger than the sum of its proper divisors (1).

81452953 is an equidigital number, since it uses as much as digits as its factorization.

81452953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The square root of 81452953 is about 9025.1289741477. The cubic root of 81452953 is about 433.4798801518.

The spelling of 81452953 in words is "eighty-one million, four hundred fifty-two thousand, nine hundred fifty-three".