1120001989 has 16 divisors (see below), whose sum is σ = 1165761072. Its totient is φ = 1075396608.

The previous prime is 1120001983. The next prime is 1120001999. The reversal of 1120001989 is 9891000211.

It can be written as a sum of positive squares in 8 ways, for example, as 37920964 + 1082081025 = 6158^2 + 32895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1120001989 - 2⁵ = 1120001957 is a prime.

It is a super-2 number, since 2×1120001989² = 2508808910727912242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1120001989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120001983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528997 + ... + 531109.

It is an arithmetic number, because the mean of its divisors is an integer number (72860067).

Almost surely, 2^1120001989 is an apocalyptic number.

It is an amenable number.

1120001989 is a deficient number, since it is larger than the sum of its proper divisors (45759083).

1120001989 is a wasteful number, since it uses less digits than its factorization.

1120001989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 1120001989 is about 33466.4307777211. The cubic root of 1120001989 is about 1038.4994351241.

The spelling of 1120001989 in words is "one billion, one hundred twenty million, one thousand, nine hundred eighty-nine".