120198913 has 4 divisors (see below), whose sum is σ = 120220848. Its totient is φ = 120176980.

The previous prime is 120198907. The next prime is 120198917. The reversal of 120198913 is 319891021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 319891021 = 2203 ⋅145207.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120198913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120198917) 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 3 ways as a sum of consecutive naturals, for example, 5070 + ... + 16312.

It is an arithmetic number, because the mean of its divisors is an integer number (30055212).

Almost surely, 2^120198913 is an apocalyptic number.

It is an amenable number.

120198913 is a deficient number, since it is larger than the sum of its proper divisors (21935).

120198913 is a wasteful number, since it uses less digits than its factorization.

120198913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21934.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 120198913 is about 10963.5264855794. The cubic root of 120198913 is about 493.5147986653.

The spelling of 120198913 in words is "one hundred twenty million, one hundred ninety-eight thousand, nine hundred thirteen".