55723973 has 2 divisors, whose sum is σ = 55723974. Its totient is φ = 55723972.

The previous prime is 55723949. The next prime is 55724027. The reversal of 55723973 is 37932755.

55723973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53479969 + 2244004 = 7313^2 + 1498^2 .

It is a cyclic number.

It is not a de Polignac number, because 55723973 - 2¹⁶ = 55658437 is a prime.

It is a super-2 number, since 2×55723973² = 6210322333809458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55723973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55723933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27861986 + 27861987.

It is an arithmetic number, because the mean of its divisors is an integer number (27861987).

Almost surely, 2^55723973 is an apocalyptic number.

It is an amenable number.

55723973 is a deficient number, since it is larger than the sum of its proper divisors (1).

55723973 is an equidigital number, since it uses as much as digits as its factorization.

55723973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 198450, while the sum is 41.

The square root of 55723973 is about 7464.8491612356. The cubic root of 55723973 is about 381.9566049039.

The spelling of 55723973 in words is "fifty-five million, seven hundred twenty-three thousand, nine hundred seventy-three".