900149 has 2 divisors, whose sum is σ = 900150. Its totient is φ = 900148.

The previous prime is 900143. The next prime is 900157. The reversal of 900149 is 941009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552049 + 348100 = 743^2 + 590^2 .

It is an emirp because it is prime and its reverse (941009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 900149 - 2⁸ = 899893 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 900149.

It is not a weakly prime, because it can be changed into another prime (900143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450074 + 450075.

It is an arithmetic number, because the mean of its divisors is an integer number (450075).

2⁹⁰⁰¹⁴⁹ is an apocalyptic number.

It is an amenable number.

900149 is a deficient number, since it is larger than the sum of its proper divisors (1).

900149 is an equidigital number, since it uses as much as digits as its factorization.

900149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 900149 is about 948.7618246957. The cubic root of 900149 is about 96.5542662376.

The spelling of 900149 in words is "nine hundred thousand, one hundred forty-nine".