989929 has 2 divisors, whose sum is σ = 989930. Its totient is φ = 989928.

The previous prime is 989921. The next prime is 989939. The reversal of 989929 is 929989.

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., 570025 + 419904 = 755^2 + 648^2 .

It is a cyclic number.

It is not a de Polignac number, because 989929 - 2³ = 989921 is a prime.

It is a Chen prime.

989929 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (989921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494964 + 494965.

It is an arithmetic number, because the mean of its divisors is an integer number (494965).

2⁹⁸⁹⁹²⁹ is an apocalyptic number.

It is an amenable number.

989929 is a deficient number, since it is larger than the sum of its proper divisors (1).

989929 is an equidigital number, since it uses as much as digits as its factorization.

989929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 46.

The square root of 989929 is about 994.9517576245. The cubic root of 989929 is about 99.6631667072.

The spelling of 989929 in words is "nine hundred eighty-nine thousand, nine hundred twenty-nine".