8742609 has 6 divisors (see below), whose sum is σ = 12628226. Its totient is φ = 5828400.

The previous prime is 8742577. The next prime is 8742623. The reversal of 8742609 is 9062478.

8742609 is a `hidden beast` number, since 8 + 7 + 42 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4928400 + 3814209 = 2220^2 + 1953^2 .

It is not a de Polignac number, because 8742609 - 2⁵ = 8742577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8742689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 485692 + ... + 485709.

Almost surely, 2^8742609 is an apocalyptic number.

It is an amenable number.

8742609 is a deficient number, since it is larger than the sum of its proper divisors (3885617).

8742609 is a wasteful number, since it uses less digits than its factorization.

8742609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971407 (or 971404 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 8742609 is about 2956.7903206010. The cubic root of 8742609 is about 206.0062287996.

The spelling of 8742609 in words is "eight million, seven hundred forty-two thousand, six hundred nine".