1383449905 has 4 divisors (see below), whose sum is σ = 1660139892. Its totient is φ = 1106759920.

The previous prime is 1383449897. The next prime is 1383449923. The reversal of 1383449905 is 5099443831.

It is a happy number.

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 1106427169 + 277022736 = 33263^2 + 16644^2 .

It is not a de Polignac number, because 1383449905 - 2³ = 1383449897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138344986 + ... + 138344995.

It is an arithmetic number, because the mean of its divisors is an integer number (415034973).

Almost surely, 2^1383449905 is an apocalyptic number.

It is an amenable number.

1383449905 is a deficient number, since it is larger than the sum of its proper divisors (276689987).

1383449905 is an equidigital number, since it uses as much as digits as its factorization.

1383449905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276689986.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 1383449905 is about 37194.7564180759. The cubic root of 1383449905 is about 1114.2632641723.

The spelling of 1383449905 in words is "one billion, three hundred eighty-three million, four hundred forty-nine thousand, nine hundred five".