383721699989 has 2 divisors, whose sum is σ = 383721699990. Its totient is φ = 383721699988.

The previous prime is 383721699971. The next prime is 383721700049. The reversal of 383721699989 is 989996127383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311391900625 + 72329799364 = 558025^2 + 268942^2 .

It is a cyclic number.

It is not a de Polignac number, because 383721699989 - 2¹⁶ = 383721634453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (383721699089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191860849994 + 191860849995.

It is an arithmetic number, because the mean of its divisors is an integer number (191860849995).

Almost surely, 2^383721699989 is an apocalyptic number.

It is an amenable number.

383721699989 is a deficient number, since it is larger than the sum of its proper divisors (1).

383721699989 is an equidigital number, since it uses as much as digits as its factorization.

383721699989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317447424, while the sum is 74.

The spelling of 383721699989 in words is "three hundred eighty-three billion, seven hundred twenty-one million, six hundred ninety-nine thousand, nine hundred eighty-nine".