82621849 has 4 divisors (see below), whose sum is σ = 82710964. Its totient is φ = 82532736.

The previous prime is 82621843. The next prime is 82621879. The reversal of 82621849 is 94812628.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24206400 + 58415449 = 4920^2 + 7643^2 .

It is a cyclic number.

It is not a de Polignac number, because 82621849 - 2¹⁷ = 82490777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82621843) 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, 43152 + ... + 45025.

It is an arithmetic number, because the mean of its divisors is an integer number (20677741).

Almost surely, 2^82621849 is an apocalyptic number.

It is an amenable number.

82621849 is a deficient number, since it is larger than the sum of its proper divisors (89115).

82621849 is an equidigital number, since it uses as much as digits as its factorization.

82621849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89114.

The product of its digits is 55296, while the sum is 40.

The square root of 82621849 is about 9089.6561541128. The cubic root of 82621849 is about 435.5436001417.

The spelling of 82621849 in words is "eighty-two million, six hundred twenty-one thousand, eight hundred forty-nine".