1630734403 has 4 divisors (see below), whose sum is σ = 1631376208. Its totient is φ = 1630092600.

The previous prime is 1630734377. The next prime is 1630734407. The reversal of 1630734403 is 3044370361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3044370361 = 19 ⋅160230019.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630734403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630734407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317076 + ... + 322177.

It is an arithmetic number, because the mean of its divisors is an integer number (407844052).

Almost surely, 2^1630734403 is an apocalyptic number.

1630734403 is a deficient number, since it is larger than the sum of its proper divisors (641805).

1630734403 is an equidigital number, since it uses as much as digits as its factorization.

1630734403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641804.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 1630734403 is about 40382.3526184397. The cubic root of 1630734403 is about 1177.0486434738.

The spelling of 1630734403 in words is "one billion, six hundred thirty million, seven hundred thirty-four thousand, four hundred three".