53440789 has 2 divisors, whose sum is σ = 53440790. Its totient is φ = 53440788.

The previous prime is 53440771. The next prime is 53440859. The reversal of 53440789 is 98704435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49238289 + 4202500 = 7017^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 53440789 - 2⁵ = 53440757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53440729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26720394 + 26720395.

It is an arithmetic number, because the mean of its divisors is an integer number (26720395).

Almost surely, 2^53440789 is an apocalyptic number.

It is an amenable number.

53440789 is a deficient number, since it is larger than the sum of its proper divisors (1).

53440789 is an equidigital number, since it uses as much as digits as its factorization.

53440789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 53440789 is about 7310.3207179986. The cubic root of 53440789 is about 376.6670410974.

The spelling of 53440789 in words is "fifty-three million, four hundred forty thousand, seven hundred eighty-nine".