1630201323 has 4 divisors (see below), whose sum is σ = 2173601768. Its totient is φ = 1086800880.

The previous prime is 1630201319. The next prime is 1630201357. The reversal of 1630201323 is 3231020361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3231020361 = 3 ⋅1077006787.

It is not a de Polignac number, because 1630201323 - 2² = 1630201319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1630201323.

It is not an unprimeable number, because it can be changed into a prime (1630201373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271700218 + ... + 271700223.

It is an arithmetic number, because the mean of its divisors is an integer number (543400442).

Almost surely, 2^1630201323 is an apocalyptic number.

1630201323 is a deficient number, since it is larger than the sum of its proper divisors (543400445).

1630201323 is an equidigital number, since it uses as much as digits as its factorization.

1630201323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543400444.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1630201323 is about 40375.7516710216. The cubic root of 1630201323 is about 1176.9203721311.

Adding to 1630201323 its reverse (3231020361), we get a palindrome (4861221684).

The spelling of 1630201323 in words is "one billion, six hundred thirty million, two hundred one thousand, three hundred twenty-three".