900131 has 4 divisors (see below), whose sum is σ = 931200. Its totient is φ = 869064.

The previous prime is 900121. The next prime is 900139. The reversal of 900131 is 131009.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900131 is a prime.

It is a super-2 number, since 2×900131² = 1620471634322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (900139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15491 + ... + 15548.

It is an arithmetic number, because the mean of its divisors is an integer number (232800).

2⁹⁰⁰¹³¹ is an apocalyptic number.

900131 is a deficient number, since it is larger than the sum of its proper divisors (31069).

900131 is a wasteful number, since it uses less digits than its factorization.

900131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31068.

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 900131 is about 948.7523386005. The cubic root of 900131 is about 96.5536226448.

The spelling of 900131 in words is "nine hundred thousand, one hundred thirty-one".