122644153 has 4 divisors (see below), whose sum is σ = 126600448. Its totient is φ = 118687860.

The previous prime is 122644147. The next prime is 122644157. The reversal of 122644153 is 351446221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122644153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122644157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1978101 + ... + 1978162.

It is an arithmetic number, because the mean of its divisors is an integer number (31650112).

Almost surely, 2^122644153 is an apocalyptic number.

It is an amenable number.

122644153 is a deficient number, since it is larger than the sum of its proper divisors (3956295).

122644153 is an equidigital number, since it uses as much as digits as its factorization.

122644153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956294.

The product of its digits is 5760, while the sum is 28.

The square root of 122644153 is about 11074.4820646385. The cubic root of 122644153 is about 496.8389280302.

The spelling of 122644153 in words is "one hundred twenty-two million, six hundred forty-four thousand, one hundred fifty-three".