405803399 has 2 divisors, whose sum is σ = 405803400. Its totient is φ = 405803398.

The previous prime is 405803371. The next prime is 405803407. The reversal of 405803399 is 993308504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405803399 - 2⁸ = 405803143 is a prime.

It is a Sophie Germain 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 (405803369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202901699 + 202901700.

It is an arithmetic number, because the mean of its divisors is an integer number (202901700).

Almost surely, 2^405803399 is an apocalyptic number.

405803399 is a deficient number, since it is larger than the sum of its proper divisors (1).

405803399 is an equidigital number, since it uses as much as digits as its factorization.

405803399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 405803399 is about 20144.5625169672. The cubic root of 405803399 is about 740.3525219582.

The spelling of 405803399 in words is "four hundred five million, eight hundred three thousand, three hundred ninety-nine".