121790194 has 8 divisors (see below), whose sum is σ = 183695148. Its totient is φ = 60558480.

The previous prime is 121790191. The next prime is 121790197. The reversal of 121790194 is 491097121.

It is an interprime number because it is at equal distance from previous prime (121790191) and next prime (121790197).

It can be written as a sum of positive squares in 2 ways, for example, as 80766169 + 41024025 = 8987^2 + 6405^2 .

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 (121790191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167857 + ... + 168580.

Almost surely, 2^121790194 is an apocalyptic number.

121790194 is a deficient number, since it is larger than the sum of its proper divisors (61904954).

121790194 is a wasteful number, since it uses less digits than its factorization.

121790194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336620.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 121790194 is about 11035.8594590544. The cubic root of 121790194 is about 495.6830945865.

The spelling of 121790194 in words is "one hundred twenty-one million, seven hundred ninety thousand, one hundred ninety-four".