43640053 has 2 divisors, whose sum is σ = 43640054. Its totient is φ = 43640052.

The previous prime is 43640029. The next prime is 43640063. The reversal of 43640053 is 35004634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29517489 + 14122564 = 5433^2 + 3758^2 .

It is a cyclic number.

It is not a de Polignac number, because 43640053 - 2²¹ = 41542901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43640063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21820026 + 21820027.

It is an arithmetic number, because the mean of its divisors is an integer number (21820027).

Almost surely, 2^43640053 is an apocalyptic number.

It is an amenable number.

43640053 is a deficient number, since it is larger than the sum of its proper divisors (1).

43640053 is an equidigital number, since it uses as much as digits as its factorization.

43640053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 43640053 is about 6606.0618374339. The cubic root of 43640053 is about 352.0695159064.

Adding to 43640053 its reverse (35004634), we get a palindrome (78644687).

The spelling of 43640053 in words is "forty-three million, six hundred forty thousand, fifty-three".