121646493 has 24 divisors (see below), whose sum is σ = 185546400. Its totient is φ = 76585824.

The previous prime is 121646479. The next prime is 121646513. The reversal of 121646493 is 394646121.

121646493 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 4 + 649 + 3 = 666.

It is not a de Polignac number, because 121646493 - 2⁴ = 121646477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121646443) 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 23 ways as a sum of consecutive naturals, for example, 63871 + ... + 65747.

It is an arithmetic number, because the mean of its divisors is an integer number (7731100).

Almost surely, 2^121646493 is an apocalyptic number.

It is an amenable number.

121646493 is a deficient number, since it is larger than the sum of its proper divisors (63899907).

121646493 is a wasteful number, since it uses less digits than its factorization.

121646493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281 (or 2278 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 121646493 is about 11029.3468981622. The cubic root of 121646493 is about 495.4880646820.

The spelling of 121646493 in words is "one hundred twenty-one million, six hundred forty-six thousand, four hundred ninety-three".