6398537 has 2 divisors, whose sum is σ = 6398538. Its totient is φ = 6398536.

The previous prime is 6398519. The next prime is 6398543. The reversal of 6398537 is 7358936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5740816 + 657721 = 2396^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 6398537 - 2⁸ = 6398281 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 3¹³ + 9 + 8 + 5⁵ + 3¹⁴ + 7⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 6398494 and 6398503.

It is not a weakly prime, because it can be changed into another prime (6398597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199268 + 3199269.

It is an arithmetic number, because the mean of its divisors is an integer number (3199269).

Almost surely, 2^6398537 is an apocalyptic number.

It is an amenable number.

6398537 is a deficient number, since it is larger than the sum of its proper divisors (1).

6398537 is an equidigital number, since it uses as much as digits as its factorization.

6398537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 6398537 is about 2529.5329608447. The cubic root of 6398537 is about 185.6494050904.

The spelling of 6398537 in words is "six million, three hundred ninety-eight thousand, five hundred thirty-seven".