780023 has 4 divisors (see below), whose sum is σ = 787848. Its totient is φ = 772200.

The previous prime is 779993. The next prime is 780029. The reversal of 780023 is 320087.

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 780023 - 2⁸ = 779767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 779977 and 780004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780029) 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, 3761 + ... + 3962.

It is an arithmetic number, because the mean of its divisors is an integer number (196962).

2⁷⁸⁰⁰²³ is an apocalyptic number.

780023 is a deficient number, since it is larger than the sum of its proper divisors (7825).

780023 is a wasteful number, since it uses less digits than its factorization.

780023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7824.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 780023 is about 883.1891077227. The cubic root of 780023 is about 92.0525455974.

The spelling of 780023 in words is "seven hundred eighty thousand, twenty-three".