82861091 has 8 divisors (see below), whose sum is σ = 86093280. Its totient is φ = 79653952.

The previous prime is 82861087. The next prime is 82861127. The reversal of 82861091 is 19016828.

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

It is not a de Polignac number, because 82861091 - 2² = 82861087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82861001) 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, 626 + ... + 12888.

It is an arithmetic number, because the mean of its divisors is an integer number (10761660).

Almost surely, 2^82861091 is an apocalyptic number.

82861091 is a deficient number, since it is larger than the sum of its proper divisors (3232189).

82861091 is a wasteful number, since it uses less digits than its factorization.

82861091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12525.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 82861091 is about 9102.8067649489. The cubic root of 82861091 is about 435.9635855316.

The spelling of 82861091 in words is "eighty-two million, eight hundred sixty-one thousand, ninety-one".