1309973006 has 4 divisors (see below), whose sum is σ = 1964959512. Its totient is φ = 654986502.

The previous prime is 1309973003. The next prime is 1309973011. The reversal of 1309973006 is 6003799031.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309973003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327493250 + ... + 327493253.

It is an arithmetic number, because the mean of its divisors is an integer number (491239878).

Almost surely, 2^1309973006 is an apocalyptic number.

1309973006 is a deficient number, since it is larger than the sum of its proper divisors (654986506).

1309973006 is an equidigital number, since it uses as much as digits as its factorization.

1309973006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654986505.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 1309973006 is about 36193.5492318728. The cubic root of 1309973006 is about 1094.1766656865.

The spelling of 1309973006 in words is "one billion, three hundred nine million, nine hundred seventy-three thousand, six".