1323929905 has 4 divisors (see below), whose sum is σ = 1588715892. Its totient is φ = 1059143920.

The previous prime is 1323929903. The next prime is 1323929941. The reversal of 1323929905 is 5099293231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 983010609 + 340919296 = 31353^2 + 18464^2 .

It is not a de Polignac number, because 1323929905 - 2¹ = 1323929903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323929903) 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, 132392986 + ... + 132392995.

It is an arithmetic number, because the mean of its divisors is an integer number (397178973).

Almost surely, 2^1323929905 is an apocalyptic number.

It is an amenable number.

1323929905 is a deficient number, since it is larger than the sum of its proper divisors (264785987).

1323929905 is an equidigital number, since it uses as much as digits as its factorization.

1323929905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264785986.

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 1323929905 is about 36385.8475921614. The cubic root of 1323929905 is about 1098.0488566000.

The spelling of 1323929905 in words is "one billion, three hundred twenty-three million, nine hundred twenty-nine thousand, nine hundred five".