380721841 has 2 divisors, whose sum is σ = 380721842. Its totient is φ = 380721840.

The previous prime is 380721833. The next prime is 380721863. The reversal of 380721841 is 148127083.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221861025 + 158860816 = 14895^2 + 12604^2 .

It is a cyclic number.

It is not a de Polignac number, because 380721841 - 2³ = 380721833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 380721797 and 380721806.

It is not a weakly prime, because it can be changed into another prime (380721821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190360920 + 190360921.

It is an arithmetic number, because the mean of its divisors is an integer number (190360921).

Almost surely, 2^380721841 is an apocalyptic number.

It is an amenable number.

380721841 is a deficient number, since it is larger than the sum of its proper divisors (1).

380721841 is an equidigital number, since it uses as much as digits as its factorization.

380721841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 380721841 is about 19512.0947363424. The cubic root of 380721841 is about 724.7739864656.

The spelling of 380721841 in words is "three hundred eighty million, seven hundred twenty-one thousand, eight hundred forty-one".