83403707209 has 9 divisors (see below), whose sum is σ = 85022657013. Its totient is φ = 81815034912.

The previous prime is 83403707207. The next prime is 83403707221. The reversal of 83403707209 is 90270730438.

The square root of 83403707209 is 288797.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4314519225 + 79089187984 = 65685^2 + 281228^2 .

It is not a de Polignac number, because 83403707209 - 2¹ = 83403707207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83403707203) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15303517 + ... + 15308965.

Almost surely, 2^83403707209 is an apocalyptic number.

83403707209 is the 288797-th square number.

83403707209 is the 144399-th centered octagonal number.

It is an amenable number.

83403707209 is a deficient number, since it is larger than the sum of its proper divisors (1618949804).

83403707209 is an frugal number, since it uses more digits than its factorization.

83403707209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11004 (or 5502 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 83403707209 in words is "eighty-three billion, four hundred three million, seven hundred seven thousand, two hundred nine".