121668494 has 8 divisors (see below), whose sum is σ = 182561688. Its totient is φ = 60814600.

The previous prime is 121668493. The next prime is 121668509. The reversal of 121668494 is 494866121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121668493) 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, 197 + ... + 15600.

It is an arithmetic number, because the mean of its divisors is an integer number (22820211).

Almost surely, 2^121668494 is an apocalyptic number.

121668494 is a deficient number, since it is larger than the sum of its proper divisors (60893194).

121668494 is a wasteful number, since it uses less digits than its factorization.

121668494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19650.

The product of its digits is 82944, while the sum is 41.

The square root of 121668494 is about 11030.3442376020. The cubic root of 121668494 is about 495.5179342259.

The spelling of 121668494 in words is "one hundred twenty-one million, six hundred sixty-eight thousand, four hundred ninety-four".