121387679 has 8 divisors (see below), whose sum is σ = 138851328. Its totient is φ = 103954680.

The previous prime is 121387631. The next prime is 121387691. The reversal of 121387679 is 976783121.

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 121387679 - 2⁸ = 121387423 is a prime.

It is a super-2 number, since 2×121387679² = 29469937226014082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121387579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1574 + ... + 15660.

It is an arithmetic number, because the mean of its divisors is an integer number (17356416).

Almost surely, 2^121387679 is an apocalyptic number.

121387679 is a deficient number, since it is larger than the sum of its proper divisors (17463649).

121387679 is a wasteful number, since it uses less digits than its factorization.

121387679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15325.

The product of its digits is 127008, while the sum is 44.

The square root of 121387679 is about 11017.6076804359. The cubic root of 121387679 is about 495.1364165050.

The spelling of 121387679 in words is "one hundred twenty-one million, three hundred eighty-seven thousand, six hundred seventy-nine".