409408403 has 2 divisors, whose sum is σ = 409408404. Its totient is φ = 409408402.

The previous prime is 409408381. The next prime is 409408423. The reversal of 409408403 is 304804904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409408403 - 2⁶ = 409408339 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 409408403.

It is not a weakly prime, because it can be changed into another prime (409408423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204704201 + 204704202.

It is an arithmetic number, because the mean of its divisors is an integer number (204704202).

Almost surely, 2^409408403 is an apocalyptic number.

409408403 is a deficient number, since it is larger than the sum of its proper divisors (1).

409408403 is an equidigital number, since it uses as much as digits as its factorization.

409408403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 409408403 is about 20233.8430111534. The cubic root of 409408403 is about 742.5383991599.

The spelling of 409408403 in words is "four hundred nine million, four hundred eight thousand, four hundred three".