1988059999 has 2 divisors, whose sum is σ = 1988060000. Its totient is φ = 1988059998.

The previous prime is 1988059973. The next prime is 1988060021. The reversal of 1988059999 is 9999508891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1988059999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1988059499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994029999 + 994030000.

It is an arithmetic number, because the mean of its divisors is an integer number (994030000).

Almost surely, 2^1988059999 is an apocalyptic number.

1988059999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988059999 is an equidigital number, since it uses as much as digits as its factorization.

1988059999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18895680, while the sum is 67.

The square root of 1988059999 is about 44587.6664448814. Note that the first 3 decimals coincide. The cubic root of 1988059999 is about 1257.4088007670.

The spelling of 1988059999 in words is "one billion, nine hundred eighty-eight million, fifty-nine thousand, nine hundred ninety-nine".