380721629 has 2 divisors, whose sum is σ = 380721630. Its totient is φ = 380721628.

The previous prime is 380721611. The next prime is 380721641. The reversal of 380721629 is 926127083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199092100 + 181629529 = 14110^2 + 13477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-380721629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 380721592 and 380721601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380721689) 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 as a sum of consecutive naturals, namely, 190360814 + 190360815.

It is an arithmetic number, because the mean of its divisors is an integer number (190360815).

Almost surely, 2^380721629 is an apocalyptic number.

It is an amenable number.

380721629 is a deficient number, since it is larger than the sum of its proper divisors (1).

380721629 is an equidigital number, since it uses as much as digits as its factorization.

380721629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 380721629 is about 19512.0893038137. The cubic root of 380721629 is about 724.7738519386.

The spelling of 380721629 in words is "three hundred eighty million, seven hundred twenty-one thousand, six hundred twenty-nine".