797528561 has 4 divisors (see below), whose sum is σ = 797699952. Its totient is φ = 797357172.

The previous prime is 797528549. The next prime is 797528569. The reversal of 797528561 is 165825797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165825797 = 3547 ⋅46751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-797528561 is a prime.

It is a super-3 number, since 3×797528561³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (797528569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78515 + ... + 88088.

It is an arithmetic number, because the mean of its divisors is an integer number (199424988).

Almost surely, 2^797528561 is an apocalyptic number.

It is an amenable number.

797528561 is a deficient number, since it is larger than the sum of its proper divisors (171391).

797528561 is a wasteful number, since it uses less digits than its factorization.

797528561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171390.

The product of its digits is 1058400, while the sum is 50.

The square root of 797528561 is about 28240.5481710253. The cubic root of 797528561 is about 927.3608303187.

The spelling of 797528561 in words is "seven hundred ninety-seven million, five hundred twenty-eight thousand, five hundred sixty-one".