89477333921 has 2 divisors, whose sum is σ = 89477333922. Its totient is φ = 89477333920.

The previous prime is 89477333893. The next prime is 89477333923. The reversal of 89477333921 is 12933377498.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89392030225 + 85303696 = 298985^2 + 9236^2 .

It is a cyclic number.

It is not a de Polignac number, because 89477333921 - 2²² = 89473139617 is a prime.

It is a super-2 number, since 2×89477333921² (a number of 23 digits) contains 22 as substring.

Together with 89477333923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89477333923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44738666960 + 44738666961.

It is an arithmetic number, because the mean of its divisors is an integer number (44738666961).

Almost surely, 2^89477333921 is an apocalyptic number.

It is an amenable number.

89477333921 is a deficient number, since it is larger than the sum of its proper divisors (1).

89477333921 is an equidigital number, since it uses as much as digits as its factorization.

89477333921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 56.

The spelling of 89477333921 in words is "eighty-nine billion, four hundred seventy-seven million, three hundred thirty-three thousand, nine hundred twenty-one".