989898929 has 2 divisors, whose sum is σ = 989898930. Its totient is φ = 989898928.

The previous prime is 989898887. The next prime is 989898941. The reversal of 989898929 is 929898989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 694849600 + 295049329 = 26360^2 + 17177^2 .

It is an emirp because it is prime and its reverse (929898989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989898929 - 2¹⁶ = 989833393 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (989898989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494949464 + 494949465.

It is an arithmetic number, because the mean of its divisors is an integer number (494949465).

Almost surely, 2^989898929 is an apocalyptic number.

It is an amenable number.

989898929 is a deficient number, since it is larger than the sum of its proper divisors (1).

989898929 is an equidigital number, since it uses as much as digits as its factorization.

989898929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60466176, while the sum is 71.

The square root of 989898929 is about 31462.6592804868. The cubic root of 989898929 is about 996.6215754343.

The spelling of 989898929 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred twenty-nine".