1988479853 has 4 divisors (see below), whose sum is σ = 1988632800. Its totient is φ = 1988326908.

The previous prime is 1988479837. The next prime is 1988479873. The reversal of 1988479853 is 3589748891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3589748891 = 41 ⋅87554851.

It is a cyclic number.

It is not a de Polignac number, because 1988479853 - 2⁴ = 1988479837 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 (1988479873) 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, 54953 + ... + 83646.

It is an arithmetic number, because the mean of its divisors is an integer number (497158200).

Almost surely, 2^1988479853 is an apocalyptic number.

It is an amenable number.

1988479853 is a deficient number, since it is larger than the sum of its proper divisors (152947).

1988479853 is a wasteful number, since it uses less digits than its factorization.

1988479853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152946.

The product of its digits is 17418240, while the sum is 62.

The square root of 1988479853 is about 44592.3743817259. The cubic root of 1988479853 is about 1257.4973109990.

The spelling of 1988479853 in words is "one billion, nine hundred eighty-eight million, four hundred seventy-nine thousand, eight hundred fifty-three".