989001021049 has 2 divisors, whose sum is σ = 989001021050. Its totient is φ = 989001021048.

The previous prime is 989001021037. The next prime is 989001021139. The reversal of 989001021049 is 940120100989.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 808618189824 + 180382831225 = 899232^2 + 424715^2 .

It is a cyclic number.

It is not a de Polignac number, because 989001021049 - 2⁷ = 989001020921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 989001020996 and 989001021014.

It is not a weakly prime, because it can be changed into another prime (989001025049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494500510524 + 494500510525.

It is an arithmetic number, because the mean of its divisors is an integer number (494500510525).

Almost surely, 2^989001021049 is an apocalyptic number.

It is an amenable number.

989001021049 is a deficient number, since it is larger than the sum of its proper divisors (1).

989001021049 is an equidigital number, since it uses as much as digits as its factorization.

989001021049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 43.

The spelling of 989001021049 in words is "nine hundred eighty-nine billion, one million, twenty-one thousand, forty-nine".