745213009 has 2 divisors, whose sum is σ = 745213010. Its totient is φ = 745213008.

The previous prime is 745212997. The next prime is 745213031. The reversal of 745213009 is 900312547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485100625 + 260112384 = 22025^2 + 16128^2 .

It is a cyclic number.

It is not a de Polignac number, because 745213009 - 2⁹ = 745212497 is a prime.

It is not a weakly prime, because it can be changed into another prime (745213039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372606504 + 372606505.

It is an arithmetic number, because the mean of its divisors is an integer number (372606505).

Almost surely, 2^745213009 is an apocalyptic number.

It is an amenable number.

745213009 is a deficient number, since it is larger than the sum of its proper divisors (1).

745213009 is an equidigital number, since it uses as much as digits as its factorization.

745213009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 745213009 is about 27298.5898720062. The cubic root of 745213009 is about 906.6231603229.

The spelling of 745213009 in words is "seven hundred forty-five million, two hundred thirteen thousand, nine".