900228449 has 2 divisors, whose sum is σ = 900228450. Its totient is φ = 900228448.

The previous prime is 900228359. The next prime is 900228457. The reversal of 900228449 is 944822009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 848848225 + 51380224 = 29135^2 + 7168^2 .

It is an emirp because it is prime and its reverse (944822009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 900228449 - 2²⁰ = 899179873 is a prime.

It is a super-2 number, since 2×900228449² = 1620822520777891202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (900224449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450114224 + 450114225.

It is an arithmetic number, because the mean of its divisors is an integer number (450114225).

Almost surely, 2^900228449 is an apocalyptic number.

It is an amenable number.

900228449 is a deficient number, since it is larger than the sum of its proper divisors (1).

900228449 is an equidigital number, since it uses as much as digits as its factorization.

900228449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 900228449 is about 30003.8072417485. The cubic root of 900228449 is about 965.5710684667.

The spelling of 900228449 in words is "nine hundred million, two hundred twenty-eight thousand, four hundred forty-nine".