780460729 has 4 divisors (see below), whose sum is σ = 783362340. Its totient is φ = 777559120.

The previous prime is 780460711. The next prime is 780460757. The reversal of 780460729 is 927064087.

780460729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 167650704 + 612810025 = 12948^2 + 24755^2 .

It is a cyclic number.

It is not a de Polignac number, because 780460729 - 2⁵ = 780460697 is a prime.

It is a super-2 number, since 2×780460729² = 1218237899022422882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780460799) 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, 1450402 + ... + 1450939.

It is an arithmetic number, because the mean of its divisors is an integer number (195840585).

Almost surely, 2^780460729 is an apocalyptic number.

It is an amenable number.

780460729 is a deficient number, since it is larger than the sum of its proper divisors (2901611).

780460729 is a wasteful number, since it uses less digits than its factorization.

780460729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901610.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 780460729 is about 27936.7272421091. The cubic root of 780460729 is about 920.6976155711.

The spelling of 780460729 in words is "seven hundred eighty million, four hundred sixty thousand, seven hundred twenty-nine".