900170051009 has 2 divisors, whose sum is σ = 900170051010. Its totient is φ = 900170051008.

The previous prime is 900170051003. The next prime is 900170051047. The reversal of 900170051009 is 900150071009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 869640177025 + 30529873984 = 932545^2 + 174728^2 .

It is a cyclic number.

It is not a de Polignac number, because 900170051009 - 2¹² = 900170046913 is a prime.

It is a super-2 number, since 2×900170051009² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (900170051003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450085025504 + 450085025505.

It is an arithmetic number, because the mean of its divisors is an integer number (450085025505).

Almost surely, 2^900170051009 is an apocalyptic number.

It is an amenable number.

900170051009 is a deficient number, since it is larger than the sum of its proper divisors (1).

900170051009 is an equidigital number, since it uses as much as digits as its factorization.

900170051009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 32.

The spelling of 900170051009 in words is "nine hundred billion, one hundred seventy million, fifty-one thousand, nine".