380909 has 2 divisors, whose sum is σ = 380910. Its totient is φ = 380908.

The previous prime is 380881. The next prime is 380917. The reversal of 380909 is 909083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366025 + 14884 = 605^2 + 122^2 .

It is a cyclic number.

It is not a de Polignac number, because 380909 - 2¹⁶ = 315373 is a prime.

It is a Chen prime.

380909 is a modest number, since divided by 909 gives 38 as remainder.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190454 + 190455.

It is an arithmetic number, because the mean of its divisors is an integer number (190455).

2³⁸⁰⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

380909 is a deficient number, since it is larger than the sum of its proper divisors (1).

380909 is an equidigital number, since it uses as much as digits as its factorization.

380909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 380909 is about 617.1782562599. The cubic root of 380909 is about 72.4892730860.

The spelling of 380909 in words is "three hundred eighty thousand, nine hundred nine".