89427545777 has 2 divisors, whose sum is σ = 89427545778. Its totient is φ = 89427545776.

The previous prime is 89427545747. The next prime is 89427545849. The reversal of 89427545777 is 77754572498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59192943616 + 30234602161 = 243296^2 + 173881^2 .

It is a cyclic number.

It is not a de Polignac number, because 89427545777 - 2⁸ = 89427545521 is a prime.

It is not a weakly prime, because it can be changed into another prime (89427545747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44713772888 + 44713772889.

It is an arithmetic number, because the mean of its divisors is an integer number (44713772889).

Almost surely, 2^89427545777 is an apocalyptic number.

It is an amenable number.

89427545777 is a deficient number, since it is larger than the sum of its proper divisors (1).

89427545777 is an equidigital number, since it uses as much as digits as its factorization.

89427545777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138297600, while the sum is 65.

The spelling of 89427545777 in words is "eighty-nine billion, four hundred twenty-seven million, five hundred forty-five thousand, seven hundred seventy-seven".