53439641 has 6 divisors (see below), whose sum is σ = 54208026. Its totient is φ = 52682000.

The previous prime is 53439623. The next prime is 53439643. The reversal of 53439641 is 14693435.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51423241 + 2016400 = 7171^2 + 1420^2 .

It is a de Polignac number, because none of the positive numbers 2^k-53439641 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53439643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 260 + ... + 10341.

It is an arithmetic number, because the mean of its divisors is an integer number (9034671).

Almost surely, 2^53439641 is an apocalyptic number.

It is an amenable number.

53439641 is a deficient number, since it is larger than the sum of its proper divisors (768385).

53439641 is an equidigital number, since it uses as much as digits as its factorization.

53439641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10743 (or 10672 counting only the distinct ones).

The product of its digits is 38880, while the sum is 35.

The square root of 53439641 is about 7310.2421984501. The cubic root of 53439641 is about 376.6643439263.

The spelling of 53439641 in words is "fifty-three million, four hundred thirty-nine thousand, six hundred forty-one".