121632647 has 4 divisors (see below), whose sum is σ = 121851576. Its totient is φ = 121413720.

The previous prime is 121632631. The next prime is 121632649. The reversal of 121632647 is 746236121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121632647 - 2⁴ = 121632631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121632649) 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, 108629 + ... + 109742.

It is an arithmetic number, because the mean of its divisors is an integer number (30462894).

Almost surely, 2^121632647 is an apocalyptic number.

121632647 is a deficient number, since it is larger than the sum of its proper divisors (218929).

121632647 is an equidigital number, since it uses as much as digits as its factorization.

121632647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218928.

The product of its digits is 12096, while the sum is 32.

The square root of 121632647 is about 11028.7191912751. The cubic root of 121632647 is about 495.4692648852.

Adding to 121632647 its reverse (746236121), we get a palindrome (867868768).

The spelling of 121632647 in words is "one hundred twenty-one million, six hundred thirty-two thousand, six hundred forty-seven".