81232697 has 8 divisors (see below), whose sum is σ = 99978816. Its totient is φ = 64271952.

The previous prime is 81232693. The next prime is 81232699. The reversal of 81232697 is 79623218.

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 81232697 - 2² = 81232693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81232697.

It is not an unprimeable number, because it can be changed into a prime (81232691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446243 + ... + 446424.

It is an arithmetic number, because the mean of its divisors is an integer number (12497352).

Almost surely, 2^81232697 is an apocalyptic number.

It is an amenable number.

81232697 is a deficient number, since it is larger than the sum of its proper divisors (18746119).

81232697 is a wasteful number, since it uses less digits than its factorization.

81232697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892687.

The product of its digits is 36288, while the sum is 38.

The square root of 81232697 is about 9012.9183398054. The cubic root of 81232697 is about 433.0888047743.

The spelling of 81232697 in words is "eighty-one million, two hundred thirty-two thousand, six hundred ninety-seven".