89643824947 has 2 divisors, whose sum is σ = 89643824948. Its totient is φ = 89643824946.

The previous prime is 89643824939. The next prime is 89643824951. The reversal of 89643824947 is 74942834698.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89643824947 - 2³ = 89643824939 is a prime.

It is a super-2 number, since 2×89643824947² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89643824147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44821912473 + 44821912474.

It is an arithmetic number, because the mean of its divisors is an integer number (44821912474).

Almost surely, 2^89643824947 is an apocalyptic number.

89643824947 is a deficient number, since it is larger than the sum of its proper divisors (1).

89643824947 is an equidigital number, since it uses as much as digits as its factorization.

89643824947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83607552, while the sum is 64.

The spelling of 89643824947 in words is "eighty-nine billion, six hundred forty-three million, eight hundred twenty-four thousand, nine hundred forty-seven".