900901 has 4 divisors (see below), whose sum is σ = 906592. Its totient is φ = 895212.

The previous prime is 900869. The next prime is 900917. The reversal of 900901 is 109009.

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, and also an emirpimes, since its reverse is a distinct semiprime: 109009 = 67 ⋅1627.

It is a cyclic number.

It is not a de Polignac number, because 900901 - 2⁵ = 900869 is a prime.

It is a super-2 number, since 2×900901² = 1623245223602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900931) 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 3 ways as a sum of consecutive naturals, for example, 2601 + ... + 2926.

It is an arithmetic number, because the mean of its divisors is an integer number (226648).

2⁹⁰⁰⁹⁰¹ is an apocalyptic number.

It is an amenable number.

900901 is a deficient number, since it is larger than the sum of its proper divisors (5691).

900901 is a wasteful number, since it uses less digits than its factorization.

900901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 900901 is about 949.1580479562. The cubic root of 900901 is about 96.5811464534.

The spelling of 900901 in words is "nine hundred thousand, nine hundred one".