63609493 has 4 divisors (see below), whose sum is σ = 64687680. Its totient is φ = 62531308.

The previous prime is 63609439. The next prime is 63609509. The reversal of 63609493 is 39490636.

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 63609493 - 2⁹ = 63608981 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63609193) 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, 539005 + ... + 539122.

It is an arithmetic number, because the mean of its divisors is an integer number (16171920).

Almost surely, 2^63609493 is an apocalyptic number.

It is an amenable number.

63609493 is a deficient number, since it is larger than the sum of its proper divisors (1078187).

63609493 is a wasteful number, since it uses less digits than its factorization.

63609493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078186.

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 63609493 is about 7975.5559680815. Note that the first 3 decimals coincide. The cubic root of 63609493 is about 399.1847834336.

The spelling of 63609493 in words is "sixty-three million, six hundred nine thousand, four hundred ninety-three".