83437884917 has 2 divisors, whose sum is σ = 83437884918. Its totient is φ = 83437884916.

The previous prime is 83437884899. The next prime is 83437884941. The reversal of 83437884917 is 71948873438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44689537201 + 38748347716 = 211399^2 + 196846^2 .

It is a cyclic number.

It is not a de Polignac number, because 83437884917 - 2¹⁴ = 83437868533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83437884917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83437884997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41718942458 + 41718942459.

It is an arithmetic number, because the mean of its divisors is an integer number (41718942459).

Almost surely, 2^83437884917 is an apocalyptic number.

It is an amenable number.

83437884917 is a deficient number, since it is larger than the sum of its proper divisors (1).

83437884917 is an equidigital number, since it uses as much as digits as its factorization.

83437884917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32514048, while the sum is 62.

The spelling of 83437884917 in words is "eighty-three billion, four hundred thirty-seven million, eight hundred eighty-four thousand, nine hundred seventeen".