1020319989 has 16 divisors (see below), whose sum is σ = 1467681600. Its totient is φ = 626772096.

The previous prime is 1020319961. The next prime is 1020319999. The reversal of 1020319989 is 9899130201.

It is not a de Polignac number, because 1020319989 - 2²³ = 1011931381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020319989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020319939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 799 + ... + 45180.

It is an arithmetic number, because the mean of its divisors is an integer number (91730100).

Almost surely, 2^1020319989 is an apocalyptic number.

It is an amenable number.

1020319989 is a deficient number, since it is larger than the sum of its proper divisors (447361611).

1020319989 is a wasteful number, since it uses less digits than its factorization.

1020319989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46564.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 1020319989 is about 31942.4480746232. The cubic root of 1020319989 is about 1006.7279626702.

The spelling of 1020319989 in words is "one billion, twenty million, three hundred nineteen thousand, nine hundred eighty-nine".