53644637 has 2 divisors, whose sum is σ = 53644638. Its totient is φ = 53644636.

The previous prime is 53644627. The next prime is 53644667. The reversal of 53644637 is 73644635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49857721 + 3786916 = 7061^2 + 1946^2 .

It is a cyclic number.

It is not a de Polignac number, because 53644637 - 2⁶ = 53644573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53644637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53644627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26822318 + 26822319.

It is an arithmetic number, because the mean of its divisors is an integer number (26822319).

Almost surely, 2^53644637 is an apocalyptic number.

It is an amenable number.

53644637 is a deficient number, since it is larger than the sum of its proper divisors (1).

53644637 is an equidigital number, since it uses as much as digits as its factorization.

53644637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 38.

The square root of 53644637 is about 7324.2499274670. The cubic root of 53644637 is about 377.1453611368.

It can be divided in two parts, 5364 and 4637, that added together give a palindrome (10001).

The spelling of 53644637 in words is "fifty-three million, six hundred forty-four thousand, six hundred thirty-seven".