1019941989 has 16 divisors (see below), whose sum is σ = 1484143104. Its totient is φ = 617900400.

The previous prime is 1019941973. The next prime is 1019941991. The reversal of 1019941989 is 9891499101.

1019941989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1019941989 - 2⁴ = 1019941973 is a prime.

It is a super-2 number, since 2×1019941989² = 2080563321850552242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1019941189) 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, 111462 + ... + 120264.

It is an arithmetic number, because the mean of its divisors is an integer number (92758944).

Almost surely, 2^1019941989 is an apocalyptic number.

It is an amenable number.

1019941989 is a deficient number, since it is larger than the sum of its proper divisors (464201115).

1019941989 is a wasteful number, since it uses less digits than its factorization.

1019941989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12328.

The product of its (nonzero) digits is 209952, while the sum is 51.

The square root of 1019941989 is about 31936.5306349954. The cubic root of 1019941989 is about 1006.6036258029.

The spelling of 1019941989 in words is "one billion, nineteen million, nine hundred forty-one thousand, nine hundred eighty-nine".