1989734227 has 8 divisors (see below), whose sum is σ = 2192623664. Its totient is φ = 1793963808.

The previous prime is 1989734189. The next prime is 1989734269. The reversal of 1989734227 is 7224379891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1989734227 - 2⁷ = 1989734099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1989737227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1779168 + ... + 1780285.

It is an arithmetic number, because the mean of its divisors is an integer number (274077958).

Almost surely, 2^1989734227 is an apocalyptic number.

1989734227 is a deficient number, since it is larger than the sum of its proper divisors (202889437).

1989734227 is a wasteful number, since it uses less digits than its factorization.

1989734227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559509.

The product of its digits is 1524096, while the sum is 52.

The square root of 1989734227 is about 44606.4370578956. The cubic root of 1989734227 is about 1257.7616738097.

The spelling of 1989734227 in words is "one billion, nine hundred eighty-nine million, seven hundred thirty-four thousand, two hundred twenty-seven".