11913681939 has 8 divisors (see below), whose sum is σ = 15887424960. Its totient is φ = 7941196776.

The previous prime is 11913681937. The next prime is 11913681959. The reversal of 11913681939 is 93918631911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11913681939 - 2¹ = 11913681937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11913681891 and 11913681900.

It is not an unprimeable number, because it can be changed into a prime (11913681931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292137 + ... + 330410.

It is an arithmetic number, because the mean of its divisors is an integer number (1985928120).

Almost surely, 2^11913681939 is an apocalyptic number.

11913681939 is a deficient number, since it is larger than the sum of its proper divisors (3973743021).

11913681939 is an equidigital number, since it uses as much as digits as its factorization.

11913681939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628929.

The product of its digits is 314928, while the sum is 51.

The spelling of 11913681939 in words is "eleven billion, nine hundred thirteen million, six hundred eighty-one thousand, nine hundred thirty-nine".