780384067 has 4 divisors (see below), whose sum is σ = 783201616. Its totient is φ = 777566520.

The previous prime is 780384047. The next prime is 780384079. The reversal of 780384067 is 760483087.

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 780384067 - 2¹⁹ = 779859779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780384047) 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, 1408359 + ... + 1408912.

It is an arithmetic number, because the mean of its divisors is an integer number (195800404).

Almost surely, 2^780384067 is an apocalyptic number.

780384067 is a deficient number, since it is larger than the sum of its proper divisors (2817549).

780384067 is a wasteful number, since it uses less digits than its factorization.

780384067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817548.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 780384067 is about 27935.3551436168. The cubic root of 780384067 is about 920.6674689201.

The spelling of 780384067 in words is "seven hundred eighty million, three hundred eighty-four thousand, sixty-seven".