1989011347 has 8 divisors (see below), whose sum is σ = 2004697296. Its totient is φ = 1973342592.

The previous prime is 1989011341. The next prime is 1989011351. The reversal of 1989011347 is 7431109891.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1989011347 is a prime.

It is a super-2 number, since 2×1989011347² = 7912332276989508818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1989011341) 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, 324808 + ... + 330874.

It is an arithmetic number, because the mean of its divisors is an integer number (250587162).

Almost surely, 2^1989011347 is an apocalyptic number.

1989011347 is a deficient number, since it is larger than the sum of its proper divisors (15685949).

1989011347 is a wasteful number, since it uses less digits than its factorization.

1989011347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8597.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 1989011347 is about 44598.3334554106. Note that the first 3 decimals coincide. The cubic root of 1989011347 is about 1257.6093384080.

The spelling of 1989011347 in words is "one billion, nine hundred eighty-nine million, eleven thousand, three hundred forty-seven".