120553389 has 36 divisors (see below), whose sum is σ = 197631616. Its totient is φ = 70686000.

The previous prime is 120553387. The next prime is 120553399. The reversal of 120553389 is 983355021.

120553389 is a `hidden beast` number, since 1 + 20 + 553 + 3 + 89 = 666.

It is not a de Polignac number, because 120553389 - 2¹ = 120553387 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120553387) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 31974 + ... + 35544.

Almost surely, 2^120553389 is an apocalyptic number.

It is an amenable number.

120553389 is a deficient number, since it is larger than the sum of its proper divisors (77078227).

120553389 is a wasteful number, since it uses less digits than its factorization.

120553389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630 (or 3616 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 120553389 is about 10979.6807330632. The cubic root of 120553389 is about 493.9994604615. Note that the first 3 decimals are identical.

The spelling of 120553389 in words is "one hundred twenty million, five hundred fifty-three thousand, three hundred eighty-nine".