745302609 has 6 divisors (see below), whose sum is σ = 1076548226. Its totient is φ = 496868400.

The previous prime is 745302601. The next prime is 745302653. The reversal of 745302609 is 906203547.

745302609 is a `hidden beast` number, since 7 + 45 + 3 + 0 + 2 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 745126209 + 176400 = 27297^2 + 420^2 .

It is not a de Polignac number, because 745302609 - 2³ = 745302601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745302601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41405692 + ... + 41405709.

Almost surely, 2^745302609 is an apocalyptic number.

It is an amenable number.

745302609 is a deficient number, since it is larger than the sum of its proper divisors (331245617).

745302609 is a wasteful number, since it uses less digits than its factorization.

745302609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82811407 (or 82811404 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 745302609 is about 27300.2309330892. The cubic root of 745302609 is about 906.6594945337.

The spelling of 745302609 in words is "seven hundred forty-five million, three hundred two thousand, six hundred nine".