1998869503 has 4 divisors (see below), whose sum is σ = 2116450080. Its totient is φ = 1881288928.

The previous prime is 1998869497. The next prime is 1998869513. The reversal of 1998869503 is 3059688991.

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 1998869503 - 2⁵ = 1998869471 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 (1998869513) 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, 58790263 + ... + 58790296.

It is an arithmetic number, because the mean of its divisors is an integer number (529112520).

Almost surely, 2^1998869503 is an apocalyptic number.

1998869503 is a deficient number, since it is larger than the sum of its proper divisors (117580577).

1998869503 is a wasteful number, since it uses less digits than its factorization.

1998869503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117580576.

The product of its (nonzero) digits is 4199040, while the sum is 58.

The square root of 1998869503 is about 44708.7184226969. The cubic root of 1998869503 is about 1259.6836156583.

The spelling of 1998869503 in words is "one billion, nine hundred ninety-eight million, eight hundred sixty-nine thousand, five hundred three".