815973697 has 8 divisors (see below), whose sum is σ = 1017317952. Its totient is φ = 635823600.

The previous prime is 815973679. The next prime is 815973709. The reversal of 815973697 is 796379518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 815973697 - 2¹¹ = 815971649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (815973097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5298454 + ... + 5298607.

It is an arithmetic number, because the mean of its divisors is an integer number (127164744).

Almost surely, 2^815973697 is an apocalyptic number.

It is an amenable number.

815973697 is a deficient number, since it is larger than the sum of its proper divisors (201344255).

815973697 is a wasteful number, since it uses less digits than its factorization.

815973697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10597079.

The product of its digits is 2857680, while the sum is 55.

The square root of 815973697 is about 28565.2533158731. The cubic root of 815973697 is about 934.4557050188.

The spelling of 815973697 in words is "eight hundred fifteen million, nine hundred seventy-three thousand, six hundred ninety-seven".