999998537 has 2 divisors, whose sum is σ = 999998538. Its totient is φ = 999998536.

The previous prime is 999998533. The next prime is 999998563. The reversal of 999998537 is 735899999.

999998537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 958769296 + 41229241 = 30964^2 + 6421^2 .

It is an emirp because it is prime and its reverse (735899999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999998537 - 2² = 999998533 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999998533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999268 + 499999269.

It is an arithmetic number, because the mean of its divisors is an integer number (499999269).

Almost surely, 2^999998537 is an apocalyptic number.

It is an amenable number.

999998537 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998537 is an equidigital number, since it uses as much as digits as its factorization.

999998537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49601160, while the sum is 68.

The square root of 999998537 is about 31622.7534696142. The cubic root of 999998537 is about 999.9995123331. Note that the first 3 decimals are identical.

The spelling of 999998537 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, five hundred thirty-seven".