999939137 has 2 divisors, whose sum is σ = 999939138. Its totient is φ = 999939136.

The previous prime is 999939121. The next prime is 999939203. The reversal of 999939137 is 731939999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 953821456 + 46117681 = 30884^2 + 6791^2 .

It is a cyclic number.

It is not a de Polignac number, because 999939137 - 2⁴ = 999939121 is a prime.

It is not a weakly prime, because it can be changed into another prime (999939737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499969568 + 499969569.

It is an arithmetic number, because the mean of its divisors is an integer number (499969569).

Almost surely, 2^999939137 is an apocalyptic number.

It is an amenable number.

999939137 is a deficient number, since it is larger than the sum of its proper divisors (1).

999939137 is an equidigital number, since it uses as much as digits as its factorization.

999939137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3720087, while the sum is 59.

The square root of 999939137 is about 31621.8142585146. The cubic root of 999939137 is about 999.9797119217.

The spelling of 999939137 in words is "nine hundred ninety-nine million, nine hundred thirty-nine thousand, one hundred thirty-seven".