409212403 has 2 divisors, whose sum is σ = 409212404. Its totient is φ = 409212402.

The previous prime is 409212361. The next prime is 409212407. The reversal of 409212403 is 304212904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409212403 - 2¹⁷ = 409081331 is a prime.

It is not a weakly prime, because it can be changed into another prime (409212407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204606201 + 204606202.

It is an arithmetic number, because the mean of its divisors is an integer number (204606202).

Almost surely, 2^409212403 is an apocalyptic number.

409212403 is a deficient number, since it is larger than the sum of its proper divisors (1).

409212403 is an equidigital number, since it uses as much as digits as its factorization.

409212403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 409212403 is about 20228.9990607543. Note that the first 3 decimals coincide. The cubic root of 409212403 is about 742.4198860760.

The spelling of 409212403 in words is "four hundred nine million, two hundred twelve thousand, four hundred three".