89739988381 has 2 divisors, whose sum is σ = 89739988382. Its totient is φ = 89739988380.

The previous prime is 89739988379. The next prime is 89739988417. The reversal of 89739988381 is 18388993798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58743216900 + 30996771481 = 242370^2 + 176059^2 .

It is a cyclic number.

It is not a de Polignac number, because 89739988381 - 2¹ = 89739988379 is a prime.

It is a super-2 number, since 2×89739988381² (a number of 23 digits) contains 22 as substring.

Together with 89739988379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89739988181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44869994190 + 44869994191.

It is an arithmetic number, because the mean of its divisors is an integer number (44869994191).

Almost surely, 2^89739988381 is an apocalyptic number.

It is an amenable number.

89739988381 is a deficient number, since it is larger than the sum of its proper divisors (1).

89739988381 is an equidigital number, since it uses as much as digits as its factorization.

89739988381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188116992, while the sum is 73.

The spelling of 89739988381 in words is "eighty-nine billion, seven hundred thirty-nine million, nine hundred eighty-eight thousand, three hundred eighty-one".