380811643 has 2 divisors, whose sum is σ = 380811644. Its totient is φ = 380811642.

The previous prime is 380811589. The next prime is 380811689. The reversal of 380811643 is 346118083.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 380811643 - 2⁹ = 380811131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 380811599 and 380811608.

It is not a weakly prime, because it can be changed into another prime (380811043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190405821 + 190405822.

It is an arithmetic number, because the mean of its divisors is an integer number (190405822).

Almost surely, 2^380811643 is an apocalyptic number.

380811643 is a deficient number, since it is larger than the sum of its proper divisors (1).

380811643 is an equidigital number, since it uses as much as digits as its factorization.

380811643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 380811643 is about 19514.3957887504. The cubic root of 380811643 is about 724.8309668555.

It can be divided in two parts, 3808 and 11643, that added together give a palindrome (15451).

The spelling of 380811643 in words is "three hundred eighty million, eight hundred eleven thousand, six hundred forty-three".