82147117 has 16 divisors (see below), whose sum is σ = 93284352. Its totient is φ = 71804160.

The previous prime is 82147103. The next prime is 82147129. The reversal of 82147117 is 71174128.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82147117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82147817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16773 + ... + 21109.

It is an arithmetic number, because the mean of its divisors is an integer number (5830272).

Almost surely, 2^82147117 is an apocalyptic number.

It is an amenable number.

82147117 is a deficient number, since it is larger than the sum of its proper divisors (11137235).

82147117 is a wasteful number, since it uses less digits than its factorization.

82147117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428.

The product of its digits is 3136, while the sum is 31.

The square root of 82147117 is about 9063.5046753450. The cubic root of 82147117 is about 434.7078092394.

The spelling of 82147117 in words is "eighty-two million, one hundred forty-seven thousand, one hundred seventeen".