121583649 has 8 divisors (see below), whose sum is σ = 176848992. Its totient is φ = 73687040.

The previous prime is 121583639. The next prime is 121583653. The reversal of 121583649 is 946385121.

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 121583649 - 2⁴ = 121583633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121583639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1842144 + ... + 1842209.

It is an arithmetic number, because the mean of its divisors is an integer number (22106124).

Almost surely, 2^121583649 is an apocalyptic number.

It is an amenable number.

121583649 is a deficient number, since it is larger than the sum of its proper divisors (55265343).

121583649 is a wasteful number, since it uses less digits than its factorization.

121583649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684367.

The product of its digits is 51840, while the sum is 39.

The square root of 121583649 is about 11026.4975853623. The cubic root of 121583649 is about 495.4027250095.

The spelling of 121583649 in words is "one hundred twenty-one million, five hundred eighty-three thousand, six hundred forty-nine".