82101887 has 4 divisors (see below), whose sum is σ = 93830736. Its totient is φ = 70373040.

The previous prime is 82101883. The next prime is 82101893. The reversal of 82101887 is 78810128.

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

It is a cyclic number.

It is not a de Polignac number, because 82101887 - 2² = 82101883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82101883) 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, 5864414 + ... + 5864427.

It is an arithmetic number, because the mean of its divisors is an integer number (23457684).

Almost surely, 2^82101887 is an apocalyptic number.

82101887 is a deficient number, since it is larger than the sum of its proper divisors (11728849).

82101887 is a wasteful number, since it uses less digits than its factorization.

82101887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11728848.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 82101887 is about 9061.0091601322. The cubic root of 82101887 is about 434.6280115763.

The spelling of 82101887 in words is "eighty-two million, one hundred one thousand, eight hundred eighty-seven".