989099801 has 2 divisors, whose sum is σ = 989099802. Its totient is φ = 989099800.

The previous prime is 989099791. The next prime is 989099807. The reversal of 989099801 is 108990989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 597851401 + 391248400 = 24451^2 + 19780^2 .

It is an emirp because it is prime and its reverse (108990989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989099801 - 2⁶ = 989099737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (989099807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494549900 + 494549901.

It is an arithmetic number, because the mean of its divisors is an integer number (494549901).

Almost surely, 2^989099801 is an apocalyptic number.

It is an amenable number.

989099801 is a deficient number, since it is larger than the sum of its proper divisors (1).

989099801 is an equidigital number, since it uses as much as digits as its factorization.

989099801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 53.

The square root of 989099801 is about 31449.9570905908. The cubic root of 989099801 is about 996.3533182101.

The spelling of 989099801 in words is "nine hundred eighty-nine million, ninety-nine thousand, eight hundred one".