121689037 has 2 divisors, whose sum is σ = 121689038. Its totient is φ = 121689036.

The previous prime is 121689031. The next prime is 121689109. The reversal of 121689037 is 730986121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67798756 + 53890281 = 8234^2 + 7341^2 .

It is an emirp because it is prime and its reverse (730986121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121689037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121688987 and 121689005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121689031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60844518 + 60844519.

It is an arithmetic number, because the mean of its divisors is an integer number (60844519).

Almost surely, 2^121689037 is an apocalyptic number.

It is an amenable number.

121689037 is a deficient number, since it is larger than the sum of its proper divisors (1).

121689037 is an equidigital number, since it uses as much as digits as its factorization.

121689037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 121689037 is about 11031.2754022370. The cubic root of 121689037 is about 495.5458210730.

The spelling of 121689037 in words is "one hundred twenty-one million, six hundred eighty-nine thousand, thirty-seven".