63605973 has 4 divisors (see below), whose sum is σ = 84807968. Its totient is φ = 42403980.

The previous prime is 63605963. The next prime is 63605999. The reversal of 63605973 is 37950636.

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 not a de Polignac number, because 63605973 - 2⁹ = 63605461 is a prime.

It is a super-3 number, since 3×63605973³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63605933) 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, 10600993 + ... + 10600998.

It is an arithmetic number, because the mean of its divisors is an integer number (21201992).

Almost surely, 2^63605973 is an apocalyptic number.

It is an amenable number.

63605973 is a deficient number, since it is larger than the sum of its proper divisors (21201995).

63605973 is a wasteful number, since it uses less digits than its factorization.

63605973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21201994.

The product of its (nonzero) digits is 102060, while the sum is 39.

The square root of 63605973 is about 7975.3352907574. The cubic root of 63605973 is about 399.1774199815.

The spelling of 63605973 in words is "sixty-three million, six hundred five thousand, nine hundred seventy-three".