409025381 has 2 divisors, whose sum is σ = 409025382. Its totient is φ = 409025380.

The previous prime is 409025359. The next prime is 409025437. The reversal of 409025381 is 183520904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402604225 + 6421156 = 20065^2 + 2534^2 .

It is a cyclic number.

It is not a de Polignac number, because 409025381 - 2¹⁴ = 409008997 is a prime.

It is a super-2 number, since 2×409025381² = 334603524604390322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409025311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204512690 + 204512691.

It is an arithmetic number, because the mean of its divisors is an integer number (204512691).

Almost surely, 2^409025381 is an apocalyptic number.

It is an amenable number.

409025381 is a deficient number, since it is larger than the sum of its proper divisors (1).

409025381 is an equidigital number, since it uses as much as digits as its factorization.

409025381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 409025381 is about 20224.3759112611. The cubic root of 409025381 is about 742.3067663294.

The spelling of 409025381 in words is "four hundred nine million, twenty-five thousand, three hundred eighty-one".