900869 has 2 divisors, whose sum is σ = 900870. Its totient is φ = 900868.

The previous prime is 900863. The next prime is 900917. The reversal of 900869 is 968009.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 879844 + 21025 = 938^2 + 145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900869 is a prime.

It is a super-2 number, since 2×900869² = 1623129910322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450434 + 450435.

It is an arithmetic number, because the mean of its divisors is an integer number (450435).

2⁹⁰⁰⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

900869 is a deficient number, since it is larger than the sum of its proper divisors (1).

900869 is an equidigital number, since it uses as much as digits as its factorization.

900869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 900869 is about 949.1411907614. The cubic root of 900869 is about 96.5800029192.

The spelling of 900869 in words is "nine hundred thousand, eight hundred sixty-nine".