7920403 has 4 divisors (see below), whose sum is σ = 7973008. Its totient is φ = 7867800.

The previous prime is 7920401. The next prime is 7920431. The reversal of 7920403 is 3040297.

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 7920403 - 2¹ = 7920401 is a prime.

It is a Duffinian number.

7920403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7920401) 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, 26076 + ... + 26377.

It is an arithmetic number, because the mean of its divisors is an integer number (1993252).

Almost surely, 2^7920403 is an apocalyptic number.

7920403 is a deficient number, since it is larger than the sum of its proper divisors (52605).

7920403 is a wasteful number, since it uses less digits than its factorization.

7920403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52604.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 7920403 is about 2814.3210548905. The cubic root of 7920403 is about 199.3344795356.

The spelling of 7920403 in words is "seven million, nine hundred twenty thousand, four hundred three".