53721963 has 6 divisors (see below), whose sum is σ = 77598404. Its totient is φ = 35814636.

The previous prime is 53721961. The next prime is 53722003. The reversal of 53721963 is 36912735.

It is not a de Polignac number, because 53721963 - 2¹ = 53721961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53721961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2984545 + ... + 2984562.

Almost surely, 2^53721963 is an apocalyptic number.

53721963 is a deficient number, since it is larger than the sum of its proper divisors (23876441).

53721963 is a wasteful number, since it uses less digits than its factorization.

53721963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969113 (or 5969110 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 53721963 is about 7329.5267923652. The cubic root of 53721963 is about 377.3264860522.

It can be divided in two parts, 537 and 21963, that added together give a square (22500 = 150²).

The spelling of 53721963 in words is "fifty-three million, seven hundred twenty-one thousand, nine hundred sixty-three".