304040040389 has 2 divisors, whose sum is σ = 304040040390. Its totient is φ = 304040040388.

The previous prime is 304040040361. The next prime is 304040040407. The reversal of 304040040389 is 983040040403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 300994876900 + 3045163489 = 548630^2 + 55183^2 .

It is a cyclic number.

It is not a de Polignac number, because 304040040389 - 2¹⁶ = 304039974853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304040040089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152020020194 + 152020020195.

It is an arithmetic number, because the mean of its divisors is an integer number (152020020195).

Almost surely, 2^304040040389 is an apocalyptic number.

It is an amenable number.

304040040389 is a deficient number, since it is larger than the sum of its proper divisors (1).

304040040389 is an equidigital number, since it uses as much as digits as its factorization.

304040040389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 304040040389 in words is "three hundred four billion, forty million, forty thousand, three hundred eighty-nine".