989351801 has 2 divisors, whose sum is σ = 989351802. Its totient is φ = 989351800.

The previous prime is 989351761. The next prime is 989351807. The reversal of 989351801 is 108153989.

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., 873143401 + 116208400 = 29549^2 + 10780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989351801 is a prime.

It is a super-2 number, since 2×989351801² = 1957633972283887202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (989351807) 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, 494675900 + 494675901.

It is an arithmetic number, because the mean of its divisors is an integer number (494675901).

Almost surely, 2^989351801 is an apocalyptic number.

It is an amenable number.

989351801 is a deficient number, since it is larger than the sum of its proper divisors (1).

989351801 is an equidigital number, since it uses as much as digits as its factorization.

989351801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 989351801 is about 31453.9632002074. The cubic root of 989351801 is about 996.4379270352.

The spelling of 989351801 in words is "nine hundred eighty-nine million, three hundred fifty-one thousand, eight hundred one".