780100673 has 6 divisors (see below), whose sum is σ = 857466162. Its totient is φ = 709182320.

The previous prime is 780100663. The next prime is 780100691. The reversal of 780100673 is 376001087.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 722158129 + 57942544 = 26873^2 + 7612^2 .

It is not a de Polignac number, because 780100673 - 2⁸ = 780100417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780100663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3223436 + ... + 3223677.

It is an arithmetic number, because the mean of its divisors is an integer number (142911027).

Almost surely, 2^780100673 is an apocalyptic number.

It is an amenable number.

780100673 is a deficient number, since it is larger than the sum of its proper divisors (77365489).

780100673 is a wasteful number, since it uses less digits than its factorization.

780100673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6447135 (or 6447124 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 780100673 is about 27930.2823652035. The cubic root of 780100673 is about 920.5560096027.

The spelling of 780100673 in words is "seven hundred eighty million, one hundred thousand, six hundred seventy-three".