989437942541 has 2 divisors, whose sum is σ = 989437942542. Its totient is φ = 989437942540.

The previous prime is 989437942459. The next prime is 989437942583. The reversal of 989437942541 is 145249734989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 557038322500 + 432399620041 = 746350^2 + 657571^2 .

It is an emirp because it is prime and its reverse (145249734989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989437942541 - 2¹⁰ = 989437941517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989437942741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494718971270 + 494718971271.

It is an arithmetic number, because the mean of its divisors is an integer number (494718971271).

Almost surely, 2^989437942541 is an apocalyptic number.

It is an amenable number.

989437942541 is a deficient number, since it is larger than the sum of its proper divisors (1).

989437942541 is an equidigital number, since it uses as much as digits as its factorization.

989437942541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78382080, while the sum is 65.

The spelling of 989437942541 in words is "nine hundred eighty-nine billion, four hundred thirty-seven million, nine hundred forty-two thousand, five hundred forty-one".