7780423 has 4 divisors (see below), whose sum is σ = 8891920. Its totient is φ = 6668928.

The previous prime is 7780403. The next prime is 7780429. The reversal of 7780423 is 3240877.

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

It is not a de Polignac number, because 7780423 - 2⁵ = 7780391 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 (7780429) 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, 555738 + ... + 555751.

It is an arithmetic number, because the mean of its divisors is an integer number (2222980).

Almost surely, 2^7780423 is an apocalyptic number.

7780423 is a deficient number, since it is larger than the sum of its proper divisors (1111497).

7780423 is a wasteful number, since it uses less digits than its factorization.

7780423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111496.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 7780423 is about 2789.3409615893. The cubic root of 7780423 is about 198.1531906335.

The spelling of 7780423 in words is "seven million, seven hundred eighty thousand, four hundred twenty-three".