81452087 has 2 divisors, whose sum is σ = 81452088. Its totient is φ = 81452086.

The previous prime is 81452053. The next prime is 81452089. The reversal of 81452087 is 78025418.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81452087 - 2⁶ = 81452023 is a prime.

Together with 81452089, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4749380 and since 81452087 and 4749380 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81452089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40726043 + 40726044.

It is an arithmetic number, because the mean of its divisors is an integer number (40726044).

Almost surely, 2^81452087 is an apocalyptic number.

81452087 is a deficient number, since it is larger than the sum of its proper divisors (1).

81452087 is an equidigital number, since it uses as much as digits as its factorization.

81452087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 81452087 is about 9025.0809968665. The cubic root of 81452087 is about 433.4783439075.

The spelling of 81452087 in words is "eighty-one million, four hundred fifty-two thousand, eighty-seven".