83607440821 has 2 divisors, whose sum is σ = 83607440822. Its totient is φ = 83607440820.

The previous prime is 83607440797. The next prime is 83607440843. The reversal of 83607440821 is 12804470638.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71670785796 + 11936655025 = 267714^2 + 109255^2 .

It is a cyclic number.

It is not a de Polignac number, because 83607440821 - 2²³ = 83599052213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83607440221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41803720410 + 41803720411.

It is an arithmetic number, because the mean of its divisors is an integer number (41803720411).

Almost surely, 2^83607440821 is an apocalyptic number.

It is an amenable number.

83607440821 is a deficient number, since it is larger than the sum of its proper divisors (1).

83607440821 is an equidigital number, since it uses as much as digits as its factorization.

83607440821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 83607440821 in words is "eighty-three billion, six hundred seven million, four hundred forty thousand, eight hundred twenty-one".