1997845103 has 4 divisors (see below), whose sum is σ = 1999479888. Its totient is φ = 1996210320.

The previous prime is 1997845039. The next prime is 1997845111. The reversal of 1997845103 is 3015487991.

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 1997845103 - 2⁶ = 1997845039 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 (1997845133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815558 + ... + 818003.

It is an arithmetic number, because the mean of its divisors is an integer number (499869972).

Almost surely, 2^1997845103 is an apocalyptic number.

1997845103 is a deficient number, since it is larger than the sum of its proper divisors (1634785).

1997845103 is a wasteful number, since it uses less digits than its factorization.

1997845103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634784.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 1997845103 is about 44697.2605760129. The cubic root of 1997845103 is about 1259.4683872673.

The spelling of 1997845103 in words is "one billion, nine hundred ninety-seven million, eight hundred forty-five thousand, one hundred three".