1031989105 has 16 divisors (see below), whose sum is σ = 1445414400. Its totient is φ = 692592192.

The previous prime is 1031989081. The next prime is 1031989109. The reversal of 1031989105 is 5019891301.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1031989105 - 2²³ = 1023600497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1031989109) 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, 312030 + ... + 315319.

It is an arithmetic number, because the mean of its divisors is an integer number (90338400).

Almost surely, 2^1031989105 is an apocalyptic number.

It is an amenable number.

1031989105 is a deficient number, since it is larger than the sum of its proper divisors (413425295).

1031989105 is an equidigital number, since it uses as much as digits as its factorization.

1031989105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627408.

The product of its (nonzero) digits is 9720, while the sum is 37.

The square root of 1031989105 is about 32124.5872347023. The cubic root of 1031989105 is about 1010.5513132292.

The spelling of 1031989105 in words is "one billion, thirty-one million, nine hundred eighty-nine thousand, one hundred five".