121939894 has 8 divisors (see below), whose sum is σ = 183347640. Its totient is φ = 60824016.

The previous prime is 121939849. The next prime is 121939913. The reversal of 121939894 is 498939121.

It is a happy number.

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

It is a congruent 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, 71919 + ... + 73594.

It is an arithmetic number, because the mean of its divisors is an integer number (22918455).

Almost surely, 2^121939894 is an apocalyptic number.

121939894 is a deficient number, since it is larger than the sum of its proper divisors (61407746).

121939894 is a wasteful number, since it uses less digits than its factorization.

121939894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145934.

The product of its digits is 139968, while the sum is 46.

The square root of 121939894 is about 11042.6398112046. The cubic root of 121939894 is about 495.8861032052.

The spelling of 121939894 in words is "one hundred twenty-one million, nine hundred thirty-nine thousand, eight hundred ninety-four".