780327725 has 6 divisors (see below), whose sum is σ = 967606410. Its totient is φ = 624262160.

The previous prime is 780327721. The next prime is 780327731. The reversal of 780327725 is 527723087.

It can be written as a sum of positive squares in 3 ways, for example, as 60264169 + 720063556 = 7763^2 + 26834^2 .

It is not a de Polignac number, because 780327725 - 2² = 780327721 is a prime.

It is a super-2 number, since 2×780327725² = 1217822716807351250, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780327721) 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, 15606530 + ... + 15606579.

It is an arithmetic number, because the mean of its divisors is an integer number (161267735).

Almost surely, 2^780327725 is an apocalyptic number.

It is an amenable number.

780327725 is a deficient number, since it is larger than the sum of its proper divisors (187278685).

780327725 is a wasteful number, since it uses less digits than its factorization.

780327725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31213119 (or 31213114 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 41.

The square root of 780327725 is about 27934.3466900517. The cubic root of 780327725 is about 920.6453116699.

The spelling of 780327725 in words is "seven hundred eighty million, three hundred twenty-seven thousand, seven hundred twenty-five".