989356541 has 2 divisors, whose sum is σ = 989356542. Its totient is φ = 989356540.

The previous prime is 989356493. The next prime is 989356553. The reversal of 989356541 is 145653989.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988788025 + 568516 = 31445^2 + 754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989356541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 989356541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989356591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494678270 + 494678271.

It is an arithmetic number, because the mean of its divisors is an integer number (494678271).

Almost surely, 2^989356541 is an apocalyptic number.

It is an amenable number.

989356541 is a deficient number, since it is larger than the sum of its proper divisors (1).

989356541 is an equidigital number, since it uses as much as digits as its factorization.

989356541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 50.

The square root of 989356541 is about 31454.0385483327. The cubic root of 989356541 is about 996.4395183492.

The spelling of 989356541 in words is "nine hundred eighty-nine million, three hundred fifty-six thousand, five hundred forty-one".