121678377 has 8 divisors (see below), whose sum is σ = 162298560. Its totient is φ = 81088560.

The previous prime is 121678373. The next prime is 121678393. The reversal of 121678377 is 773876121.

It is a happy number.

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

It is not a de Polignac number, because 121678377 - 2² = 121678373 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121678373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4524 + ... + 16242.

It is an arithmetic number, because the mean of its divisors is an integer number (20287320).

Almost surely, 2^121678377 is an apocalyptic number.

It is an amenable number.

121678377 is a deficient number, since it is larger than the sum of its proper divisors (40620183).

121678377 is a wasteful number, since it uses less digits than its factorization.

121678377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15183.

The product of its digits is 98784, while the sum is 42.

The square root of 121678377 is about 11030.7922199632. The cubic root of 121678377 is about 495.5313506577.

The spelling of 121678377 in words is "one hundred twenty-one million, six hundred seventy-eight thousand, three hundred seventy-seven".