999903137 has 4 divisors (see below), whose sum is σ = 1001891520. Its totient is φ = 997914756.

The previous prime is 999903097. The next prime is 999903167. The reversal of 999903137 is 731309999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 999903137 - 2⁸ = 999902881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999903167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993437 + ... + 994442.

It is an arithmetic number, because the mean of its divisors is an integer number (250472880).

Almost surely, 2^999903137 is an apocalyptic number.

It is an amenable number.

999903137 is a deficient number, since it is larger than the sum of its proper divisors (1988383).

999903137 is a wasteful number, since it uses less digits than its factorization.

999903137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988382.

The product of its (nonzero) digits is 413343, while the sum is 50.

The square root of 999903137 is about 31621.2450260897. The cubic root of 999903137 is about 999.9677112908.

The spelling of 999903137 in words is "nine hundred ninety-nine million, nine hundred three thousand, one hundred thirty-seven".