647360137 has 2 divisors, whose sum is σ = 647360138. Its totient is φ = 647360136.

The previous prime is 647360107. The next prime is 647360143. The reversal of 647360137 is 731063746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 453008656 + 194351481 = 21284^2 + 13941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647360137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647360096 and 647360105.

It is not a weakly prime, because it can be changed into another prime (647360107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323680068 + 323680069.

It is an arithmetic number, because the mean of its divisors is an integer number (323680069).

Almost surely, 2^647360137 is an apocalyptic number.

It is an amenable number.

647360137 is a deficient number, since it is larger than the sum of its proper divisors (1).

647360137 is an equidigital number, since it uses as much as digits as its factorization.

647360137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 647360137 is about 25443.2729223266. The cubic root of 647360137 is about 865.0648205626.

The spelling of 647360137 in words is "six hundred forty-seven million, three hundred sixty thousand, one hundred thirty-seven".