780139475 has 12 divisors (see below), whose sum is σ = 977348904. Its totient is φ = 617675520.

The previous prime is 780139471. The next prime is 780139483. The reversal of 780139475 is 574931087.

It is not a de Polignac number, because 780139475 - 2² = 780139471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780139471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158429 + ... + 163278.

It is an arithmetic number, because the mean of its divisors is an integer number (81445742).

Almost surely, 2^780139475 is an apocalyptic number.

780139475 is a deficient number, since it is larger than the sum of its proper divisors (197209429).

780139475 is a wasteful number, since it uses less digits than its factorization.

780139475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321814 (or 321809 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 780139475 is about 27930.9769789744. The cubic root of 780139475 is about 920.5712720867.

The spelling of 780139475 in words is "seven hundred eighty million, one hundred thirty-nine thousand, four hundred seventy-five".