53688733 has 4 divisors (see below), whose sum is σ = 61358560. Its totient is φ = 46018908.

The previous prime is 53688731. The next prime is 53688749. The reversal of 53688733 is 33788635.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53688733 - 2¹ = 53688731 is a prime.

It is a super-2 number, since 2×53688733² = 5764960102290578, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 53688733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53688731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3834903 + ... + 3834916.

It is an arithmetic number, because the mean of its divisors is an integer number (15339640).

Almost surely, 2^53688733 is an apocalyptic number.

It is an amenable number.

53688733 is a deficient number, since it is larger than the sum of its proper divisors (7669827).

53688733 is an equidigital number, since it uses as much as digits as its factorization.

53688733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7669826.

The product of its digits is 362880, while the sum is 43.

The square root of 53688733 is about 7327.2595832276. The cubic root of 53688733 is about 377.2486709180.

The spelling of 53688733 in words is "fifty-three million, six hundred eighty-eight thousand, seven hundred thirty-three".