82650861 has 12 divisors (see below), whose sum is σ = 123806592. Its totient is φ = 55100412.

The previous prime is 82650851. The next prime is 82650871. The reversal of 82650861 is 16805628.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (82650851) and next prime (82650871).

It is not a de Polignac number, because 82650861 - 2⁹ = 82650349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82650851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169821 + ... + 170306.

It is an arithmetic number, because the mean of its divisors is an integer number (10317216).

Almost surely, 2^82650861 is an apocalyptic number.

82650861 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

82650861 is a deficient number, since it is larger than the sum of its proper divisors (41155731).

82650861 is an equidigital number, since it uses as much as digits as its factorization.

82650861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340142 (or 340130 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 82650861 is about 9091.2518939913. The cubic root of 82650861 is about 435.5945733905.

The spelling of 82650861 in words is "eighty-two million, six hundred fifty thousand, eight hundred sixty-one".