82686091 has 8 divisors (see below), whose sum is σ = 83551664. Its totient is φ = 81825120.

The previous prime is 82686059. The next prime is 82686101. The reversal of 82686091 is 19068628.

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

It is a cyclic number.

It is not a de Polignac number, because 82686091 - 2⁵ = 82686059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82686041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43501 + ... + 45361.

It is an arithmetic number, because the mean of its divisors is an integer number (10443958).

Almost surely, 2^82686091 is an apocalyptic number.

82686091 is a deficient number, since it is larger than the sum of its proper divisors (865573).

82686091 is a wasteful number, since it uses less digits than its factorization.

82686091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 82686091 is about 9093.1892644990. The cubic root of 82686091 is about 435.6564554517.

The spelling of 82686091 in words is "eighty-two million, six hundred eighty-six thousand, ninety-one".