1451423209 has 2 divisors, whose sum is σ = 1451423210. Its totient is φ = 1451423208.

The previous prime is 1451423201. The next prime is 1451423249. The reversal of 1451423209 is 9023241541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1449477184 + 1946025 = 38072^2 + 1395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1451423209 - 2³ = 1451423201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1451423201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725711604 + 725711605.

It is an arithmetic number, because the mean of its divisors is an integer number (725711605).

Almost surely, 2^1451423209 is an apocalyptic number.

It is an amenable number.

1451423209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1451423209 is an equidigital number, since it uses as much as digits as its factorization.

1451423209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1451423209 is about 38097.5485956774. The cubic root of 1451423209 is about 1132.2213877017.

The spelling of 1451423209 in words is "one billion, four hundred fifty-one million, four hundred twenty-three thousand, two hundred nine".