63955973 has 4 divisors (see below), whose sum is σ = 64014048. Its totient is φ = 63897900.

The previous prime is 63955963. The next prime is 63955979. The reversal of 63955973 is 37955936.

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 63955973 - 2⁶ = 63955909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63955979) 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, 27353 + ... + 29598.

It is an arithmetic number, because the mean of its divisors is an integer number (16003512).

Almost surely, 2^63955973 is an apocalyptic number.

It is an amenable number.

63955973 is a deficient number, since it is larger than the sum of its proper divisors (58075).

63955973 is a wasteful number, since it uses less digits than its factorization.

63955973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58074.

The product of its digits is 765450, while the sum is 47.

The square root of 63955973 is about 7997.2478391006. The cubic root of 63955973 is about 399.9082560426.

The spelling of 63955973 in words is "sixty-three million, nine hundred fifty-five thousand, nine hundred seventy-three".