81454627 has 2 divisors, whose sum is σ = 81454628. Its totient is φ = 81454626.

The previous prime is 81454603. The next prime is 81454631. The reversal of 81454627 is 72645418.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81454627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81454697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40727313 + 40727314.

It is an arithmetic number, because the mean of its divisors is an integer number (40727314).

Almost surely, 2^81454627 is an apocalyptic number.

81454627 is a deficient number, since it is larger than the sum of its proper divisors (1).

81454627 is an equidigital number, since it uses as much as digits as its factorization.

81454627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 37.

The square root of 81454627 is about 9025.2217147281. The cubic root of 81454627 is about 433.4828497202.

The spelling of 81454627 in words is "eighty-one million, four hundred fifty-four thousand, six hundred twenty-seven".