82697915 has 8 divisors (see below), whose sum is σ = 99338400. Its totient is φ = 66091072.

The previous prime is 82697897. The next prime is 82697917. The reversal of 82697915 is 51979628.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82697915 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82697915.

It is not an unprimeable number, because it can be changed into a prime (82697917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2639 + ... + 13128.

It is an arithmetic number, because the mean of its divisors is an integer number (12417300).

Almost surely, 2^82697915 is an apocalyptic number.

82697915 is a deficient number, since it is larger than the sum of its proper divisors (16640485).

82697915 is a wasteful number, since it uses less digits than its factorization.

82697915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16821.

The product of its digits is 272160, while the sum is 47.

The square root of 82697915 is about 9093.8393981860. The cubic root of 82697915 is about 435.6772205580.

The spelling of 82697915 in words is "eighty-two million, six hundred ninety-seven thousand, nine hundred fifteen".