380040821 has 2 divisors, whose sum is σ = 380040822. Its totient is φ = 380040820.

The previous prime is 380040803. The next prime is 380040827. The reversal of 380040821 is 128040083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333610225 + 46430596 = 18265^2 + 6814^2 .

It is a cyclic number.

It is not a de Polignac number, because 380040821 - 2⁶ = 380040757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380040827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190020410 + 190020411.

It is an arithmetic number, because the mean of its divisors is an integer number (190020411).

Almost surely, 2^380040821 is an apocalyptic number.

It is an amenable number.

380040821 is a deficient number, since it is larger than the sum of its proper divisors (1).

380040821 is an equidigital number, since it uses as much as digits as its factorization.

380040821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 380040821 is about 19494.6356980581. The cubic root of 380040821 is about 724.3415796339.

The spelling of 380040821 in words is "three hundred eighty million, forty thousand, eight hundred twenty-one".