380720929 has 2 divisors, whose sum is σ = 380720930. Its totient is φ = 380720928.

The previous prime is 380720911. The next prime is 380720939. The reversal of 380720929 is 929027083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315950625 + 64770304 = 17775^2 + 8048^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-380720929 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 380720891 and 380720900.

It is not a weakly prime, because it can be changed into another prime (380720939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190360464 + 190360465.

It is an arithmetic number, because the mean of its divisors is an integer number (190360465).

Almost surely, 2^380720929 is an apocalyptic number.

It is an amenable number.

380720929 is a deficient number, since it is larger than the sum of its proper divisors (1).

380720929 is an equidigital number, since it uses as much as digits as its factorization.

380720929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 380720929 is about 19512.0713662082. The cubic root of 380720929 is about 724.7734077453.

The spelling of 380720929 in words is "three hundred eighty million, seven hundred twenty thousand, nine hundred twenty-nine".