121189637 has 8 divisors (see below), whose sum is σ = 125522040. Its totient is φ = 116867520.

The previous prime is 121189589. The next prime is 121189643. The reversal of 121189637 is 736981121.

It can be written as a sum of positive squares in 4 ways, for example, as 18653761 + 102535876 = 4319^2 + 10126^2 .

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 121189637 - 2⁸ = 121189381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121189637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121180637) 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, 27563 + ... + 31655.

It is an arithmetic number, because the mean of its divisors is an integer number (15690255).

Almost surely, 2^121189637 is an apocalyptic number.

It is an amenable number.

121189637 is a deficient number, since it is larger than the sum of its proper divisors (4332403).

121189637 is a wasteful number, since it uses less digits than its factorization.

121189637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143.

The product of its digits is 18144, while the sum is 38.

The square root of 121189637 is about 11008.6164889145. The cubic root of 121189637 is about 494.8670009653.

The spelling of 121189637 in words is "one hundred twenty-one million, one hundred eighty-nine thousand, six hundred thirty-seven".