121639833 has 32 divisors (see below), whose sum is σ = 213062400. Its totient is φ = 67108608.

The previous prime is 121639789. The next prime is 121639883. The reversal of 121639833 is 338936121.

121639833 is a `hidden beast` number, since 12 + 1 + 639 + 8 + 3 + 3 = 666.

It is not a de Polignac number, because 121639833 - 2⁹ = 121639321 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (121639883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5616 + ... + 16577.

It is an arithmetic number, because the mean of its divisors is an integer number (6658200).

Almost surely, 2^121639833 is an apocalyptic number.

It is an amenable number.

121639833 is a deficient number, since it is larger than the sum of its proper divisors (91422567).

121639833 is a wasteful number, since it uses less digits than its factorization.

121639833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22238 (or 22232 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 121639833 is about 11029.0449722539. The cubic root of 121639833 is about 495.4790220574.

The spelling of 121639833 in words is "one hundred twenty-one million, six hundred thirty-nine thousand, eight hundred thirty-three".