121891794 has 8 divisors (see below), whose sum is σ = 243783600. Its totient is φ = 40630596.

The previous prime is 121891787. The next prime is 121891813. The reversal of 121891794 is 497198121.

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

121891794 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10157644 + ... + 10157655.

It is an arithmetic number, because the mean of its divisors is an integer number (30472950).

Almost surely, 2^121891794 is an apocalyptic number.

121891794 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121891794 is a wasteful number, since it uses less digits than its factorization.

121891794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20315304.

The product of its digits is 36288, while the sum is 42.

The square root of 121891794 is about 11040.4616751294. The cubic root of 121891794 is about 495.8208927761.

The spelling of 121891794 in words is "one hundred twenty-one million, eight hundred ninety-one thousand, seven hundred ninety-four".