11969698837 has 4 divisors (see below), whose sum is σ = 12113912160. Its totient is φ = 11825485516.

The previous prime is 11969698817. The next prime is 11969698841. The reversal of 11969698837 is 73889696911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73889696911 = 7507 ⋅9842773.

It is a cyclic number.

It is not a de Polignac number, because 11969698837 - 2¹⁵ = 11969666069 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 (11969698817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72106537 + ... + 72106702.

It is an arithmetic number, because the mean of its divisors is an integer number (3028478040).

Almost surely, 2^11969698837 is an apocalyptic number.

It is an amenable number.

11969698837 is a deficient number, since it is larger than the sum of its proper divisors (144213323).

11969698837 is an equidigital number, since it uses as much as digits as its factorization.

11969698837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144213322.

The product of its digits is 35271936, while the sum is 67.

The spelling of 11969698837 in words is "eleven billion, nine hundred sixty-nine million, six hundred ninety-eight thousand, eight hundred thirty-seven".