11971175839 has 6 divisors (see below), whose sum is σ = 13925653584. Its totient is φ = 10261007820.

The previous prime is 11971175819. The next prime is 11971175851. The reversal of 11971175839 is 93857117911.

It is a happy number.

It is not a de Polignac number, because 11971175839 - 2⁹ = 11971175327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971175819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122154807 + ... + 122154904.

It is an arithmetic number, because the mean of its divisors is an integer number (2320942264).

Almost surely, 2^11971175839 is an apocalyptic number.

11971175839 is a deficient number, since it is larger than the sum of its proper divisors (1954477745).

11971175839 is an equidigital number, since it uses as much as digits as its factorization.

11971175839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244309725 (or 244309718 counting only the distinct ones).

The product of its digits is 476280, while the sum is 52.

The spelling of 11971175839 in words is "eleven billion, nine hundred seventy-one million, one hundred seventy-five thousand, eight hundred thirty-nine".