780042743 has 4 divisors (see below), whose sum is σ = 791685240. Its totient is φ = 768400248.

The previous prime is 780042737. The next prime is 780042749. The reversal of 780042743 is 347240087.

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

It is an interprime number because it is at equal distance from previous prime (780042737) and next prime (780042749).

It is a cyclic number.

It is not a de Polignac number, because 780042743 - 2⁴ = 780042727 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 (780042749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5821148 + ... + 5821281.

It is an arithmetic number, because the mean of its divisors is an integer number (197921310).

Almost surely, 2^780042743 is an apocalyptic number.

780042743 is a deficient number, since it is larger than the sum of its proper divisors (11642497).

780042743 is a wasteful number, since it uses less digits than its factorization.

780042743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11642496.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 780042743 is about 27929.2452995064. The cubic root of 780042743 is about 920.5332223175.

The spelling of 780042743 in words is "seven hundred eighty million, forty-two thousand, seven hundred forty-three".