121636153 has 4 divisors (see below), whose sum is σ = 121814928. Its totient is φ = 121457380.

The previous prime is 121636129. The next prime is 121636159. The reversal of 121636153 is 351636121.

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 not a de Polignac number, because 121636153 - 2⁹ = 121635641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121636159) 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, 88363 + ... + 89728.

It is an arithmetic number, because the mean of its divisors is an integer number (30453732).

Almost surely, 2^121636153 is an apocalyptic number.

It is an amenable number.

121636153 is a deficient number, since it is larger than the sum of its proper divisors (178775).

121636153 is an equidigital number, since it uses as much as digits as its factorization.

121636153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178774.

The product of its digits is 3240, while the sum is 28.

The square root of 121636153 is about 11028.8781387773. The cubic root of 121636153 is about 495.4740253904.

The spelling of 121636153 in words is "one hundred twenty-one million, six hundred thirty-six thousand, one hundred fifty-three".