1988898093 has 162 divisors, whose sum is σ = 3924826542. Its totient is φ = 961813440.

The previous prime is 1988898077. The next prime is 1988898157. The reversal of 1988898093 is 3908988891.

1988898093 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1376929449 + 611968644 = 37107^2 + 24738^2 .

It is not a de Polignac number, because 1988898093 - 2⁴ = 1988898077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 1988898093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988898053) by changing a digit.

It is a polite number, since it can be written in 161 ways as a sum of consecutive naturals, for example, 64157988 + ... + 64158018.

Almost surely, 2^1988898093 is an apocalyptic number.

1988898093 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1988898093 is a deficient number, since it is larger than the sum of its proper divisors (1935928449).

1988898093 is a wasteful number, since it uses less digits than its factorization.

1988898093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 63.

The square root of 1988898093 is about 44597.0637262141. The cubic root of 1988898093 is about 1257.5854685942.

The spelling of 1988898093 in words is "one billion, nine hundred eighty-eight million, eight hundred ninety-eight thousand, ninety-three".