1988751793 has 16 divisors (see below), whose sum is σ = 2395765120. Its totient is φ = 1612711296.

The previous prime is 1988751769. The next prime is 1988751803. The reversal of 1988751793 is 3971578891.

It is not a de Polignac number, because 1988751793 - 2¹⁷ = 1988620721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1988751703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90805 + ... + 110557.

It is an arithmetic number, because the mean of its divisors is an integer number (149735320).

Almost surely, 2^1988751793 is an apocalyptic number.

It is an amenable number.

1988751793 is a deficient number, since it is larger than the sum of its proper divisors (407013327).

1988751793 is a wasteful number, since it uses less digits than its factorization.

1988751793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20536.

The product of its digits is 3810240, while the sum is 58.

The square root of 1988751793 is about 44595.4234535339. The cubic root of 1988751793 is about 1257.5546325472.

The spelling of 1988751793 in words is "one billion, nine hundred eighty-eight million, seven hundred fifty-one thousand, seven hundred ninety-three".