82110691 has 4 divisors (see below), whose sum is σ = 88426912. Its totient is φ = 75794472.

The previous prime is 82110671. The next prime is 82110703. The reversal of 82110691 is 19601128.

It is a happy number.

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

It is not a de Polignac number, because 82110691 - 2⁷ = 82110563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82110641) 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, 3158091 + ... + 3158116.

It is an arithmetic number, because the mean of its divisors is an integer number (22106728).

Almost surely, 2^82110691 is an apocalyptic number.

82110691 is a deficient number, since it is larger than the sum of its proper divisors (6316221).

82110691 is a wasteful number, since it uses less digits than its factorization.

82110691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6316220.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 82110691 is about 9061.4949649603. The cubic root of 82110691 is about 434.6435464537.

The spelling of 82110691 in words is "eighty-two million, one hundred ten thousand, six hundred ninety-one".