999999137 has 2 divisors, whose sum is σ = 999999138. Its totient is φ = 999999136.

The previous prime is 999999131. The next prime is 999999151. The reversal of 999999137 is 731999999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 904565776 + 95433361 = 30076^2 + 9769^2 .

It is an emirp because it is prime and its reverse (731999999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999999137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999999131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999568 + 499999569.

It is an arithmetic number, because the mean of its divisors is an integer number (499999569).

Almost surely, 2^999999137 is an apocalyptic number.

It is an amenable number.

999999137 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999137 is an equidigital number, since it uses as much as digits as its factorization.

999999137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11160261, while the sum is 65.

The square root of 999999137 is about 31622.7629564527. The cubic root of 999999137 is about 999.9997123333. Note that the first 3 decimals are identical.

The spelling of 999999137 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred thirty-seven".