53440693 has 2 divisors, whose sum is σ = 53440694. Its totient is φ = 53440692.

The previous prime is 53440687. The next prime is 53440729. The reversal of 53440693 is 39604435.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52678564 + 762129 = 7258^2 + 873^2 .

It is a cyclic number.

It is not a de Polignac number, because 53440693 - 2¹³ = 53432501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53440613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26720346 + 26720347.

It is an arithmetic number, because the mean of its divisors is an integer number (26720347).

Almost surely, 2^53440693 is an apocalyptic number.

It is an amenable number.

53440693 is a deficient number, since it is larger than the sum of its proper divisors (1).

53440693 is an equidigital number, since it uses as much as digits as its factorization.

53440693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 53440693 is about 7310.3141519363. The cubic root of 53440693 is about 376.6668155515. Note that the first 3 decimals are identical.

The spelling of 53440693 in words is "fifty-three million, four hundred forty thousand, six hundred ninety-three".