813525697 has 4 divisors (see below), whose sum is σ = 835512916. Its totient is φ = 791538480.

The previous prime is 813525683. The next prime is 813525703. The reversal of 813525697 is 796525318.

813525697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796525318 = 2 ⋅398262659.

It can be written as a sum of positive squares in 2 ways, for example, as 752075776 + 61449921 = 27424^2 + 7839^2 .

It is a cyclic number.

It is not a de Polignac number, because 813525697 - 2⁷ = 813525569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813526697) 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, 10993554 + ... + 10993627.

It is an arithmetic number, because the mean of its divisors is an integer number (208878229).

Almost surely, 2^813525697 is an apocalyptic number.

It is an amenable number.

813525697 is a deficient number, since it is larger than the sum of its proper divisors (21987219).

813525697 is a wasteful number, since it uses less digits than its factorization.

813525697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21987218.

The product of its digits is 453600, while the sum is 46.

The square root of 813525697 is about 28522.3718684123. The cubic root of 813525697 is about 933.5202831149.

The spelling of 813525697 in words is "eight hundred thirteen million, five hundred twenty-five thousand, six hundred ninety-seven".