1988671829 has 2 divisors, whose sum is σ = 1988671830. Its totient is φ = 1988671828.

The previous prime is 1988671813. The next prime is 1988671843. The reversal of 1988671829 is 9281768891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1977847729 + 10824100 = 44473^2 + 3290^2 .

It is an emirp because it is prime and its reverse (9281768891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1988671829 - 2⁴ = 1988671813 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1988676829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994335914 + 994335915.

It is an arithmetic number, because the mean of its divisors is an integer number (994335915).

Almost surely, 2^1988671829 is an apocalyptic number.

It is an amenable number.

1988671829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988671829 is an equidigital number, since it uses as much as digits as its factorization.

1988671829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 59.

The square root of 1988671829 is about 44594.5268951247. The cubic root of 1988671829 is about 1257.5377776793.

The spelling of 1988671829 in words is "one billion, nine hundred eighty-eight million, six hundred seventy-one thousand, eight hundred twenty-nine".