1997827103 has 4 divisors (see below), whose sum is σ = 2035522008. Its totient is φ = 1960132200.

The previous prime is 1997827057. The next prime is 1997827177. The reversal of 1997827103 is 3017287991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1997827103 - 2¹² = 1997823007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997827193) 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 3 ways as a sum of consecutive naturals, for example, 18847373 + ... + 18847478.

It is an arithmetic number, because the mean of its divisors is an integer number (508880502).

Almost surely, 2^1997827103 is an apocalyptic number.

1997827103 is a deficient number, since it is larger than the sum of its proper divisors (37694905).

1997827103 is an equidigital number, since it uses as much as digits as its factorization.

1997827103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37694904.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 1997827103 is about 44697.0592209376. The cubic root of 1997827103 is about 1259.4646047753.

The spelling of 1997827103 in words is "one billion, nine hundred ninety-seven million, eight hundred twenty-seven thousand, one hundred three".