1989000029 has 2 divisors, whose sum is σ = 1989000030. Its totient is φ = 1989000028.

The previous prime is 1989000011. The next prime is 1989000031. The reversal of 1989000029 is 9200009891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1892076004 + 96924025 = 43498^2 + 9845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1989000029 is a prime.

It is a super-2 number, since 2×1989000029² = 7912242230724001682, which contains 22 as substring.

Together with 1989000031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1988999956 and 1989000001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1989000529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994500014 + 994500015.

It is an arithmetic number, because the mean of its divisors is an integer number (994500015).

Almost surely, 2^1989000029 is an apocalyptic number.

It is an amenable number.

1989000029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1989000029 is an equidigital number, since it uses as much as digits as its factorization.

1989000029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1989000029 is about 44598.2065670807. The cubic root of 1989000029 is about 1257.6069530270.

The spelling of 1989000029 in words is "one billion, nine hundred eighty-nine million, twenty-nine", and thus it is an aban number.