1980353923 has 8 divisors (see below), whose sum is σ = 2036733120. Its totient is φ = 1924125120.

The previous prime is 1980353917. The next prime is 1980353951. The reversal of 1980353923 is 3293530891.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1980353923 is a prime.

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 1980353923.

It is not an unprimeable number, because it can be changed into a prime (1980354923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10618 + ... + 63823.

It is an arithmetic number, because the mean of its divisors is an integer number (254591640).

Almost surely, 2^1980353923 is an apocalyptic number.

1980353923 is a deficient number, since it is larger than the sum of its proper divisors (56379197).

1980353923 is an equidigital number, since it uses as much as digits as its factorization.

1980353923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75197.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 1980353923 is about 44501.1676588379. The cubic root of 1980353923 is about 1255.7820499864.

The spelling of 1980353923 in words is "one billion, nine hundred eighty million, three hundred fifty-three thousand, nine hundred twenty-three".