1980129919 has 8 divisors (see below), whose sum is σ = 2026796112. Its totient is φ = 1933491840.

The previous prime is 1980129917. The next prime is 1980129923. The reversal of 1980129919 is 9199210891.

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

It is a cyclic number.

It is not a de Polignac number, because 1980129919 - 2¹ = 1980129917 is a prime.

It is a super-2 number, since 2×1980129919² = 7841828992237893122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980129917) 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 7 ways as a sum of consecutive naturals, for example, 221847 + ... + 230599.

It is an arithmetic number, because the mean of its divisors is an integer number (253349514).

Almost surely, 2^1980129919 is an apocalyptic number.

1980129919 is a deficient number, since it is larger than the sum of its proper divisors (46666193).

1980129919 is an equidigital number, since it uses as much as digits as its factorization.

1980129919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14057.

The product of its (nonzero) digits is 104976, while the sum is 49.

The square root of 1980129919 is about 44498.6507548263. The cubic root of 1980129919 is about 1255.7346997281.

The spelling of 1980129919 in words is "one billion, nine hundred eighty million, one hundred twenty-nine thousand, nine hundred nineteen".