121900647 has 8 divisors (see below), whose sum is σ = 177310080. Its totient is φ = 73879160.

The previous prime is 121900633. The next prime is 121900663. The reversal of 121900647 is 746009121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121900647 - 2¹⁴ = 121884263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121900697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1846947 + ... + 1847012.

It is an arithmetic number, because the mean of its divisors is an integer number (22163760).

Almost surely, 2^121900647 is an apocalyptic number.

121900647 is a deficient number, since it is larger than the sum of its proper divisors (55409433).

121900647 is a wasteful number, since it uses less digits than its factorization.

121900647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693973.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 121900647 is about 11040.8626021702. The cubic root of 121900647 is about 495.8328963079.

Adding to 121900647 its reverse (746009121), we get a palindrome (867909768).

The spelling of 121900647 in words is "one hundred twenty-one million, nine hundred thousand, six hundred forty-seven".