780686073 has 16 divisors (see below), whose sum is σ = 1161082560. Its totient is φ = 518427648.

The previous prime is 780686063. The next prime is 780686099. The reversal of 780686073 is 370686087.

780686073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 780686073 - 2⁶ = 780686009 is a prime.

It is a super-2 number, since 2×780686073² = 1218941489152322658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (780686063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49315 + ... + 63192.

It is an arithmetic number, because the mean of its divisors is an integer number (72567660).

Almost surely, 2^780686073 is an apocalyptic number.

It is an amenable number.

780686073 is a deficient number, since it is larger than the sum of its proper divisors (380396487).

780686073 is a wasteful number, since it uses less digits than its factorization.

780686073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112773 (or 112767 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 780686073 is about 27940.7600648229. The cubic root of 780686073 is about 920.7862186705.

The spelling of 780686073 in words is "seven hundred eighty million, six hundred eighty-six thousand, seventy-three".