121648623 has 4 divisors (see below), whose sum is σ = 162198168. Its totient is φ = 81099080.

The previous prime is 121648609. The next prime is 121648627. The reversal of 121648623 is 326846121.

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 121648623 - 2⁴ = 121648607 is a prime.

It is a super-2 number, since 2×121648623² = 29596774955592258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121648627) 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, 20274768 + ... + 20274773.

It is an arithmetic number, because the mean of its divisors is an integer number (40549542).

Almost surely, 2^121648623 is an apocalyptic number.

121648623 is a deficient number, since it is larger than the sum of its proper divisors (40549545).

121648623 is an equidigital number, since it uses as much as digits as its factorization.

121648623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40549544.

The product of its digits is 13824, while the sum is 33.

The square root of 121648623 is about 11029.4434583074. The cubic root of 121648623 is about 495.4909566230.

The spelling of 121648623 in words is "one hundred twenty-one million, six hundred forty-eight thousand, six hundred twenty-three".