1989000103 has 2 divisors, whose sum is σ = 1989000104. Its totient is φ = 1989000102.

The previous prime is 1989000031. The next prime is 1989000107. The reversal of 1989000103 is 3010009891.

Together with previous prime (1989000031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1989000103 is a prime.

It is a super-2 number, since 2×1989000103² = 7912242819468021218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1989000107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994500051 + 994500052.

It is an arithmetic number, because the mean of its divisors is an integer number (994500052).

Almost surely, 2^1989000103 is an apocalyptic number.

1989000103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1989000103 is an equidigital number, since it uses as much as digits as its factorization.

1989000103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1989000103 is about 44598.2073967105. The cubic root of 1989000103 is about 1257.6069686233.

Adding to 1989000103 its reverse (3010009891), we get a palindrome (4999009994).

The spelling of 1989000103 in words is "one billion, nine hundred eighty-nine million, one hundred three", and thus it is an aban number.