121789877 has 4 divisors (see below), whose sum is σ = 132861696. Its totient is φ = 110718060.

The previous prime is 121789841. The next prime is 121789883. The reversal of 121789877 is 778987121.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 121789877 - 2⁸ = 121789621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121789817) 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, 5535893 + ... + 5535914.

It is an arithmetic number, because the mean of its divisors is an integer number (33215424).

Almost surely, 2^121789877 is an apocalyptic number.

It is an amenable number.

121789877 is a deficient number, since it is larger than the sum of its proper divisors (11071819).

121789877 is a wasteful number, since it uses less digits than its factorization.

121789877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11071818.

The product of its digits is 395136, while the sum is 50.

The square root of 121789877 is about 11035.8450967744. The cubic root of 121789877 is about 495.6826645254.

The spelling of 121789877 in words is "one hundred twenty-one million, seven hundred eighty-nine thousand, eight hundred seventy-seven".