816930725 has 24 divisors (see below), whose sum is σ = 1128547560. Its totient is φ = 582462720.

The previous prime is 816930703. The next prime is 816930827. The reversal of 816930725 is 527039618.

816930725 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 28582²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 299186209 + 517744516 = 17297^2 + 22754^2 .

It is not a de Polignac number, because 816930725 - 2¹⁴ = 816914341 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33914 + ... + 52763.

It is an arithmetic number, because the mean of its divisors is an integer number (47022815).

Almost surely, 2^816930725 is an apocalyptic number.

It is an amenable number.

816930725 is a deficient number, since it is larger than the sum of its proper divisors (311616835).

816930725 is a wasteful number, since it uses less digits than its factorization.

816930725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86729 (or 86724 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 816930725 is about 28582.0000174935. Note that the first 4 decimals coincide. The cubic root of 816930725 is about 934.8208927995.

The spelling of 816930725 in words is "eight hundred sixteen million, nine hundred thirty thousand, seven hundred twenty-five".