1485431209 has 2 divisors, whose sum is σ = 1485431210. Its totient is φ = 1485431208.

The previous prime is 1485431203. The next prime is 1485431221. The reversal of 1485431209 is 9021345841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1267573609 + 217857600 = 35603^2 + 14760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1485431209 - 2³ = 1485431201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1485431201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 742715604 + 742715605.

It is an arithmetic number, because the mean of its divisors is an integer number (742715605).

Almost surely, 2^1485431209 is an apocalyptic number.

It is an amenable number.

1485431209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1485431209 is an equidigital number, since it uses as much as digits as its factorization.

1485431209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1485431209 is about 38541.2922590823. The cubic root of 1485431209 is about 1140.9961563178.

The spelling of 1485431209 in words is "one billion, four hundred eighty-five million, four hundred thirty-one thousand, two hundred nine".