89451647947 has 2 divisors, whose sum is σ = 89451647948. Its totient is φ = 89451647946.

The previous prime is 89451647933. The next prime is 89451648049. The reversal of 89451647947 is 74974615498.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89451647947 is a prime.

It is not a weakly prime, because it can be changed into another prime (89451647927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44725823973 + 44725823974.

It is an arithmetic number, because the mean of its divisors is an integer number (44725823974).

Almost surely, 2^89451647947 is an apocalyptic number.

89451647947 is a deficient number, since it is larger than the sum of its proper divisors (1).

89451647947 is an equidigital number, since it uses as much as digits as its factorization.

89451647947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 64.

The spelling of 89451647947 in words is "eighty-nine billion, four hundred fifty-one million, six hundred forty-seven thousand, nine hundred forty-seven".