8120204437 has 2 divisors, whose sum is σ = 8120204438. Its totient is φ = 8120204436.

The previous prime is 8120204431. The next prime is 8120204453. The reversal of 8120204437 is 7344020218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7793534961 + 326669476 = 88281^2 + 18074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8120204437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8120204399 and 8120204408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8120204431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060102218 + 4060102219.

It is an arithmetic number, because the mean of its divisors is an integer number (4060102219).

Almost surely, 2^8120204437 is an apocalyptic number.

It is an amenable number.

8120204437 is a deficient number, since it is larger than the sum of its proper divisors (1).

8120204437 is an equidigital number, since it uses as much as digits as its factorization.

8120204437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 8120204437 is about 90112.1769629388. The cubic root of 8120204437 is about 2009.9672805578.

The spelling of 8120204437 in words is "eight billion, one hundred twenty million, two hundred four thousand, four hundred thirty-seven".