121949768 has 8 divisors (see below), whose sum is σ = 228655830. Its totient is φ = 60974880.

The previous prime is 121949761. The next prime is 121949777. The reversal of 121949768 is 867949121.

It can be written as a sum of positive squares in only one way, i.e., 78889924 + 43059844 = 8882^2 + 6562^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (121949761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7621853 + ... + 7621868.

Almost surely, 2^121949768 is an apocalyptic number.

It is an amenable number.

121949768 is a deficient number, since it is larger than the sum of its proper divisors (106706062).

121949768 is a wasteful number, since it uses less digits than its factorization.

121949768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15243727 (or 15243723 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 121949768 is about 11043.0868872793. The cubic root of 121949768 is about 495.8994875240.

The spelling of 121949768 in words is "one hundred twenty-one million, nine hundred forty-nine thousand, seven hundred sixty-eight".