121650637 has 2 divisors, whose sum is σ = 121650638. Its totient is φ = 121650636.

The previous prime is 121650577. The next prime is 121650667. The reversal of 121650637 is 736056121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120692196 + 958441 = 10986^2 + 979^2 .

It is a cyclic number.

It is not a de Polignac number, because 121650637 - 2⁷ = 121650509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121650599 and 121650608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121650667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60825318 + 60825319.

It is an arithmetic number, because the mean of its divisors is an integer number (60825319).

Almost surely, 2^121650637 is an apocalyptic number.

It is an amenable number.

121650637 is a deficient number, since it is larger than the sum of its proper divisors (1).

121650637 is an equidigital number, since it uses as much as digits as its factorization.

121650637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 121650637 is about 11029.5347590005. The cubic root of 121650637 is about 495.4936910375.

The spelling of 121650637 in words is "one hundred twenty-one million, six hundred fifty thousand, six hundred thirty-seven".