210120393 has 16 divisors (see below), whose sum is σ = 324043776. Its totient is φ = 118621200.

The previous prime is 210120389. The next prime is 210120413. The reversal of 210120393 is 393021012.

It is a happy number.

It is not a de Polignac number, because 210120393 - 2² = 210120389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (210120193) 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 15 ways as a sum of consecutive naturals, for example, 58533 + ... + 62018.

It is an arithmetic number, because the mean of its divisors is an integer number (20252736).

Almost surely, 2^210120393 is an apocalyptic number.

It is an amenable number.

210120393 is a deficient number, since it is larger than the sum of its proper divisors (113923383).

210120393 is a wasteful number, since it uses less digits than its factorization.

210120393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120644.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 210120393 is about 14495.5301041390. The cubic root of 210120393 is about 594.5057619250.

The spelling of 210120393 in words is "two hundred ten million, one hundred twenty thousand, three hundred ninety-three".