63694609 has 4 divisors (see below), whose sum is σ = 69485040. Its totient is φ = 57904180.

The previous prime is 63694591. The next prime is 63694663. The reversal of 63694609 is 90649636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63694609 - 2⁵ = 63694577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63694679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2895199 + ... + 2895220.

It is an arithmetic number, because the mean of its divisors is an integer number (17371260).

Almost surely, 2^63694609 is an apocalyptic number.

It is an amenable number.

63694609 is a deficient number, since it is larger than the sum of its proper divisors (5790431).

63694609 is a wasteful number, since it uses less digits than its factorization.

63694609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790430.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 63694609 is about 7980.8902385636. The cubic root of 63694609 is about 399.3627540832.

The spelling of 63694609 in words is "sixty-three million, six hundred ninety-four thousand, six hundred nine".