1209393913 has 48 divisors (see below), whose sum is σ = 1542119040. Its totient is φ = 928392192.

The previous prime is 1209393863. The next prime is 1209393919. The reversal of 1209393913 is 3193939021.

It is not a de Polignac number, because 1209393913 - 2⁹ = 1209393401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1209393919) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10702545 + ... + 10702657.

It is an arithmetic number, because the mean of its divisors is an integer number (32127480).

Almost surely, 2^1209393913 is an apocalyptic number.

1209393913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1209393913 is a deficient number, since it is larger than the sum of its proper divisors (332725127).

1209393913 is a wasteful number, since it uses less digits than its factorization.

1209393913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 1209393913 is about 34776.3412825444. The cubic root of 1209393913 is about 1065.4242875855.

The spelling of 1209393913 in words is "one billion, two hundred nine million, three hundred ninety-three thousand, nine hundred thirteen".