121691679469 has 8 divisors (see below), whose sum is σ = 122535820800. Its totient is φ = 120847904016.

The previous prime is 121691679437. The next prime is 121691679491. The reversal of 121691679469 is 964976196121.

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

It is a cyclic number.

It is not a de Polignac number, because 121691679469 - 2⁵ = 121691679437 is a prime.

It is a super-2 number, since 2×121691679469² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121691679169) 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, 593764 + ... + 771970.

It is an arithmetic number, because the mean of its divisors is an integer number (15316977600).

Almost surely, 2^121691679469 is an apocalyptic number.

It is an amenable number.

121691679469 is a deficient number, since it is larger than the sum of its proper divisors (844141331).

121691679469 is a wasteful number, since it uses less digits than its factorization.

121691679469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182939.

The product of its digits is 8817984, while the sum is 61.

The spelling of 121691679469 in words is "one hundred twenty-one billion, six hundred ninety-one million, six hundred seventy-nine thousand, four hundred sixty-nine".