121662637 has 2 divisors, whose sum is σ = 121662638. Its totient is φ = 121662636.

The previous prime is 121662601. The next prime is 121662677. The reversal of 121662637 is 736266121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97397161 + 24265476 = 9869^2 + 4926^2 .

It is an emirp because it is prime and its reverse (736266121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121662637 - 2¹¹ = 121660589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121662677) 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 as a sum of consecutive naturals, namely, 60831318 + 60831319.

It is an arithmetic number, because the mean of its divisors is an integer number (60831319).

Almost surely, 2^121662637 is an apocalyptic number.

It is an amenable number.

121662637 is a deficient number, since it is larger than the sum of its proper divisors (1).

121662637 is an equidigital number, since it uses as much as digits as its factorization.

121662637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 121662637 is about 11030.0787395195. The cubic root of 121662637 is about 495.5099828519.

The spelling of 121662637 in words is "one hundred twenty-one million, six hundred sixty-two thousand, six hundred thirty-seven".