89181681877 has 2 divisors, whose sum is σ = 89181681878. Its totient is φ = 89181681876.

The previous prime is 89181681839. The next prime is 89181681907. The reversal of 89181681877 is 77818618198.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56431902916 + 32749778961 = 237554^2 + 180969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89181681877 is a prime.

It is a super-3 number, since 3×89181681877³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89181681817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44590840938 + 44590840939.

It is an arithmetic number, because the mean of its divisors is an integer number (44590840939).

Almost surely, 2^89181681877 is an apocalyptic number.

It is an amenable number.

89181681877 is a deficient number, since it is larger than the sum of its proper divisors (1).

89181681877 is an equidigital number, since it uses as much as digits as its factorization.

89181681877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016, while the sum is 64.

The spelling of 89181681877 in words is "eighty-nine billion, one hundred eighty-one million, six hundred eighty-one thousand, eight hundred seventy-seven".