8720137 has 2 divisors, whose sum is σ = 8720138. Its totient is φ = 8720136.

The previous prime is 8720119. The next prime is 8720161. The reversal of 8720137 is 7310278.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7241481 + 1478656 = 2691^2 + 1216^2 .

It is a cyclic number.

It is not a de Polignac number, because 8720137 - 2¹¹ = 8718089 is a prime.

It is not a weakly prime, because it can be changed into another prime (8720177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4360068 + 4360069.

It is an arithmetic number, because the mean of its divisors is an integer number (4360069).

Almost surely, 2^8720137 is an apocalyptic number.

It is an amenable number.

8720137 is a deficient number, since it is larger than the sum of its proper divisors (1).

8720137 is an equidigital number, since it uses as much as digits as its factorization.

8720137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 8720137 is about 2952.9878089826. The cubic root of 8720137 is about 205.8295712331.

The spelling of 8720137 in words is "eight million, seven hundred twenty thousand, one hundred thirty-seven".