1988279103 has 4 divisors (see below), whose sum is σ = 2651038808. Its totient is φ = 1325519400.

The previous prime is 1988279099. The next prime is 1988279113. The reversal of 1988279103 is 3019728891.

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

It is not a de Polignac number, because 1988279103 - 2² = 1988279099 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 (1988279113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331379848 + ... + 331379853.

It is an arithmetic number, because the mean of its divisors is an integer number (662759702).

Almost surely, 2^1988279103 is an apocalyptic number.

1988279103 is a deficient number, since it is larger than the sum of its proper divisors (662759705).

1988279103 is an equidigital number, since it uses as much as digits as its factorization.

1988279103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662759704.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 1988279103 is about 44590.1233795108. The cubic root of 1988279103 is about 1257.4549920586.

The spelling of 1988279103 in words is "one billion, nine hundred eighty-eight million, two hundred seventy-nine thousand, one hundred three".