120728213 has 4 divisors (see below), whose sum is σ = 120892320. Its totient is φ = 120564108.

The previous prime is 120728197. The next prime is 120728263. The reversal of 120728213 is 312827021.

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.

It is a cyclic number.

It is not a de Polignac number, because 120728213 - 2⁴ = 120728197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120728263) 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 3 ways as a sum of consecutive naturals, for example, 80945 + ... + 82422.

It is an arithmetic number, because the mean of its divisors is an integer number (30223080).

Almost surely, 2^120728213 is an apocalyptic number.

It is an amenable number.

120728213 is a deficient number, since it is larger than the sum of its proper divisors (164107).

120728213 is an equidigital number, since it uses as much as digits as its factorization.

120728213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164106.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 120728213 is about 10987.6391003709. The cubic root of 120728213 is about 494.2381410128.

The spelling of 120728213 in words is "one hundred twenty million, seven hundred twenty-eight thousand, two hundred thirteen".