1209706648 has 8 divisors (see below), whose sum is σ = 2268199980. Its totient is φ = 604853320.

The previous prime is 1209706639. The next prime is 1209706669. The reversal of 1209706648 is 8466079021.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 75606658 + ... + 75606673.

Almost surely, 2^1209706648 is an apocalyptic number.

It is an amenable number.

1209706648 is a deficient number, since it is larger than the sum of its proper divisors (1058493332).

1209706648 is a wasteful number, since it uses less digits than its factorization.

1209706648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151213337 (or 151213333 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1209706648 is about 34780.8373677230. The cubic root of 1209706648 is about 1065.5161150551.

The spelling of 1209706648 in words is "one billion, two hundred nine million, seven hundred six thousand, six hundred forty-eight".