780479 has 4 divisors (see below), whose sum is σ = 891984. Its totient is φ = 668976.

The previous prime is 780469. The next prime is 780499. The reversal of 780479 is 974087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974087 = 53 ⋅18379.

It is not a de Polignac number, because 780479 - 2⁸ = 780223 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 (780469) 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, 55742 + ... + 55755.

It is an arithmetic number, because the mean of its divisors is an integer number (222996).

2⁷⁸⁰⁴⁷⁹ is an apocalyptic number.

780479 is a deficient number, since it is larger than the sum of its proper divisors (111505).

780479 is a wasteful number, since it uses less digits than its factorization.

780479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111504.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 780479 is about 883.4472253621. The cubic root of 780479 is about 92.0704800188.

The spelling of 780479 in words is "seven hundred eighty thousand, four hundred seventy-nine".