780949 has 6 divisors (see below), whose sum is σ = 845826. Its totient is φ = 720720.

The previous prime is 780931. The next prime is 780953. The reversal of 780949 is 949087.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3025 + 777924 = 55^2 + 882^2 .

It is not a de Polignac number, because 780949 - 2⁵ = 780917 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 (780049) 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, 2142 + ... + 2479.

It is an arithmetic number, because the mean of its divisors is an integer number (140971).

2⁷⁸⁰⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

780949 is a deficient number, since it is larger than the sum of its proper divisors (64877).

780949 is a wasteful number, since it uses less digits than its factorization.

780949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4647 (or 4634 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 780949 is about 883.7131887666. The cubic root of 780949 is about 92.0889577495.

The spelling of 780949 in words is "seven hundred eighty thousand, nine hundred forty-nine".