121764194 has 4 divisors (see below), whose sum is σ = 182646294. Its totient is φ = 60882096.

The previous prime is 121764191. The next prime is 121764211. The reversal of 121764194 is 491467121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 491467121 = 12823 ⋅38327.

It can be written as a sum of positive squares in only one way, i.e., 119617969 + 2146225 = 10937^2 + 1465^2 .

It is not an unprimeable number, because it can be changed into a prime (121764191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30441047 + ... + 30441050.

Almost surely, 2^121764194 is an apocalyptic number.

121764194 is a deficient number, since it is larger than the sum of its proper divisors (60882100).

121764194 is an equidigital number, since it uses as much as digits as its factorization.

121764194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60882099.

The product of its digits is 12096, while the sum is 35.

The square root of 121764194 is about 11034.6814181471. The cubic root of 121764194 is about 495.6478189560.

The spelling of 121764194 in words is "one hundred twenty-one million, seven hundred sixty-four thousand, one hundred ninety-four".