82640107 has 4 divisors (see below), whose sum is σ = 90152856. Its totient is φ = 75127360.

The previous prime is 82640099. The next prime is 82640137. The reversal of 82640107 is 70104628.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 82640107 - 2³ = 82640099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82640137) 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, 3756358 + ... + 3756379.

It is an arithmetic number, because the mean of its divisors is an integer number (22538214).

Almost surely, 2^82640107 is an apocalyptic number.

82640107 is a deficient number, since it is larger than the sum of its proper divisors (7512749).

82640107 is a wasteful number, since it uses less digits than its factorization.

82640107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7512748.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 82640107 is about 9090.6604270537. The cubic root of 82640107 is about 435.5756803136.

The spelling of 82640107 in words is "eighty-two million, six hundred forty thousand, one hundred seven".