1988675651 has 2 divisors, whose sum is σ = 1988675652. Its totient is φ = 1988675650.

The previous prime is 1988675627. The next prime is 1988675659. The reversal of 1988675651 is 1565768891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1988675651 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1988675659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994337825 + 994337826.

It is an arithmetic number, because the mean of its divisors is an integer number (994337826).

Almost surely, 2^1988675651 is an apocalyptic number.

1988675651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988675651 is an equidigital number, since it uses as much as digits as its factorization.

1988675651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 56.

The square root of 1988675651 is about 44594.5697478964. The cubic root of 1988675651 is about 1257.5385832934.

The spelling of 1988675651 in words is "one billion, nine hundred eighty-eight million, six hundred seventy-five thousand, six hundred fifty-one".