120391403 has 4 divisors (see below), whose sum is σ = 131336088. Its totient is φ = 109446720.

The previous prime is 120391379. The next prime is 120391409. The reversal of 120391403 is 304193021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120391403 - 2²⁰ = 119342827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120391409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5472326 + ... + 5472347.

It is an arithmetic number, because the mean of its divisors is an integer number (32834022).

Almost surely, 2^120391403 is an apocalyptic number.

120391403 is a deficient number, since it is larger than the sum of its proper divisors (10944685).

120391403 is a wasteful number, since it uses less digits than its factorization.

120391403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10944684.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 120391403 is about 10972.3016272795. The cubic root of 120391403 is about 493.7781010979.

The spelling of 120391403 in words is "one hundred twenty million, three hundred ninety-one thousand, four hundred three".