990157 has 8 divisors (see below), whose sum is σ = 1162496. Its totient is φ = 825552.

The previous prime is 990151. The next prime is 990163. The reversal of 990157 is 751099.

It is an interprime number because it is at equal distance from previous prime (990151) and next prime (990163).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 990157 - 2¹¹ = 988109 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1653 + ... + 2170.

It is an arithmetic number, because the mean of its divisors is an integer number (145312).

2⁹⁹⁰¹⁵⁷ is an apocalyptic number.

It is an amenable number.

990157 is a deficient number, since it is larger than the sum of its proper divisors (172339).

990157 is a wasteful number, since it uses less digits than its factorization.

990157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 990157 is about 995.0663294474. The cubic root of 990157 is about 99.6708175784.

The spelling of 990157 in words is "nine hundred ninety thousand, one hundred fifty-seven".