1988554983 has 4 divisors (see below), whose sum is σ = 2651406648. Its totient is φ = 1325703320.

The previous prime is 1988554949. The next prime is 1988554987. The reversal of 1988554983 is 3894558891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1988554983 - 2⁸ = 1988554727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988554987) 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, 331425828 + ... + 331425833.

It is an arithmetic number, because the mean of its divisors is an integer number (662851662).

Almost surely, 2^1988554983 is an apocalyptic number.

1988554983 is a deficient number, since it is larger than the sum of its proper divisors (662851665).

1988554983 is an equidigital number, since it uses as much as digits as its factorization.

1988554983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662851664.

The product of its digits is 12441600, while the sum is 60.

The square root of 1988554983 is about 44593.2167823762. The cubic root of 1988554983 is about 1257.5131479851.

The spelling of 1988554983 in words is "one billion, nine hundred eighty-eight million, five hundred fifty-four thousand, nine hundred eighty-three".