990837537 has 16 divisors (see below), whose sum is σ = 1402106112. Its totient is φ = 620245760.

The previous prime is 990837527. The next prime is 990837557. The reversal of 990837537 is 735738099.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 990837537 - 2¹⁵ = 990804769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 990837537.

It is not an unprimeable number, because it can be changed into a prime (990837527) 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 15 ways as a sum of consecutive naturals, for example, 558 + ... + 44519.

It is an arithmetic number, because the mean of its divisors is an integer number (87631632).

Almost surely, 2^990837537 is an apocalyptic number.

It is an amenable number.

990837537 is a deficient number, since it is larger than the sum of its proper divisors (411268575).

990837537 is a wasteful number, since it uses less digits than its factorization.

990837537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45528.

The product of its (nonzero) digits is 1428840, while the sum is 51.

The square root of 990837537 is about 31477.5719679902. The cubic root of 990837537 is about 996.9364700348.

The spelling of 990837537 in words is "nine hundred ninety million, eight hundred thirty-seven thousand, five hundred thirty-seven".