1603408213 has 4 divisors (see below), whose sum is σ = 1749172608. Its totient is φ = 1457643820.

The previous prime is 1603408211. The next prime is 1603408217. The reversal of 1603408213 is 3128043061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1603408213 - 2¹ = 1603408211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1603408211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72882181 + ... + 72882202.

It is an arithmetic number, because the mean of its divisors is an integer number (437293152).

Almost surely, 2^1603408213 is an apocalyptic number.

It is an amenable number.

1603408213 is a deficient number, since it is larger than the sum of its proper divisors (145764395).

1603408213 is a wasteful number, since it uses less digits than its factorization.

1603408213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145764394.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1603408213 is about 40042.5799992957. The cubic root of 1603408213 is about 1170.4369792483.

The spelling of 1603408213 in words is "one billion, six hundred three million, four hundred eight thousand, two hundred thirteen".