53640973 has 2 divisors, whose sum is σ = 53640974. Its totient is φ = 53640972.

The previous prime is 53640949. The next prime is 53641031. The reversal of 53640973 is 37904635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51796809 + 1844164 = 7197^2 + 1358^2 .

It is a cyclic number.

It is not a de Polignac number, because 53640973 - 2⁵ = 53640941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53640913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26820486 + 26820487.

It is an arithmetic number, because the mean of its divisors is an integer number (26820487).

Almost surely, 2^53640973 is an apocalyptic number.

It is an amenable number.

53640973 is a deficient number, since it is larger than the sum of its proper divisors (1).

53640973 is an equidigital number, since it uses as much as digits as its factorization.

53640973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 53640973 is about 7323.9997951939. Note that the first 3 decimals coincide. The cubic root of 53640973 is about 377.1367744316.

The spelling of 53640973 in words is "fifty-three million, six hundred forty thousand, nine hundred seventy-three".