53721923 has 2 divisors, whose sum is σ = 53721924. Its totient is φ = 53721922.

The previous prime is 53721901. The next prime is 53721953. The reversal of 53721923 is 32912735.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53721923 - 2¹⁰ = 53720899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53721923.

It is not a weakly prime, because it can be changed into another prime (53721953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26860961 + 26860962.

It is an arithmetic number, because the mean of its divisors is an integer number (26860962).

Almost surely, 2^53721923 is an apocalyptic number.

53721923 is a deficient number, since it is larger than the sum of its proper divisors (1).

53721923 is an equidigital number, since it uses as much as digits as its factorization.

53721923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 32.

The square root of 53721923 is about 7329.5240636756. The cubic root of 53721923 is about 377.3263924030.

The spelling of 53721923 in words is "fifty-three million, seven hundred twenty-one thousand, nine hundred twenty-three".