391209789313 has 24 divisors (see below), whose sum is σ = 474330361344. Its totient is φ = 315735148800.

The previous prime is 391209789301. The next prime is 391209789317. The reversal of 391209789313 is 313987902193.

It is not a de Polignac number, because 391209789313 - 2⁵ = 391209789281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391209789317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361368 + ... + 955513.

It is an arithmetic number, because the mean of its divisors is an integer number (19763765056).

Almost surely, 2^391209789313 is an apocalyptic number.

It is an amenable number.

391209789313 is a deficient number, since it is larger than the sum of its proper divisors (83120572031).

391209789313 is a wasteful number, since it uses less digits than its factorization.

391209789313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316993 (or 1316956 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 55.

The spelling of 391209789313 in words is "three hundred ninety-one billion, two hundred nine million, seven hundred eighty-nine thousand, three hundred thirteen".