121386879 has 12 divisors (see below), whose sum is σ = 175911736. Its totient is φ = 80659152.

The previous prime is 121386857. The next prime is 121386883. The reversal of 121386879 is 978683121.

It is not a de Polignac number, because 121386879 - 2⁸ = 121386623 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 (121386179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19204 + ... + 24729.

Almost surely, 2^121386879 is an apocalyptic number.

121386879 is a deficient number, since it is larger than the sum of its proper divisors (54524857).

121386879 is a wasteful number, since it uses less digits than its factorization.

121386879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44246 (or 44243 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 121386879 is about 11017.5713748539. The cubic root of 121386879 is about 495.1353287779.

It can be divided in two parts, 121386 and 879, that added together give a triangular number (122265 = T₄₉₄).

The spelling of 121386879 in words is "one hundred twenty-one million, three hundred eighty-six thousand, eight hundred seventy-nine".