121661794 has 8 divisors (see below), whose sum is σ = 188379648. Its totient is φ = 58868580.

The previous prime is 121661791. The next prime is 121661819. The reversal of 121661794 is 497166121.

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

It is not an unprimeable number, because it can be changed into a prime (121661791) 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 3 ways as a sum of consecutive naturals, for example, 981082 + ... + 981205.

It is an arithmetic number, because the mean of its divisors is an integer number (23547456).

Almost surely, 2^121661794 is an apocalyptic number.

121661794 is a deficient number, since it is larger than the sum of its proper divisors (66717854).

121661794 is a wasteful number, since it uses less digits than its factorization.

121661794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962320.

The product of its digits is 18144, while the sum is 37.

The square root of 121661794 is about 11030.0405257642. The cubic root of 121661794 is about 495.5088383869.

The spelling of 121661794 in words is "one hundred twenty-one million, six hundred sixty-one thousand, seven hundred ninety-four".