1988063999 has 16 divisors (see below), whose sum is σ = 2099217120. Its totient is φ = 1880081280.

The previous prime is 1988063989. The next prime is 1988064011. The reversal of 1988063999 is 9993608891.

It is a cyclic number.

It is not a de Polignac number, because 1988063999 - 2⁸ = 1988063743 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 (1988063989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348857 + ... + 354509.

It is an arithmetic number, because the mean of its divisors is an integer number (131201070).

Almost surely, 2^1988063999 is an apocalyptic number.

1988063999 is a deficient number, since it is larger than the sum of its proper divisors (111153121).

1988063999 is a wasteful number, since it uses less digits than its factorization.

1988063999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5930.

The product of its (nonzero) digits is 7558272, while the sum is 62.

The square root of 1988063999 is about 44587.7113003123. The cubic root of 1988063999 is about 1257.4096440735.

The spelling of 1988063999 in words is "one billion, nine hundred eighty-eight million, sixty-three thousand, nine hundred ninety-nine".