52737721 has 2 divisors, whose sum is σ = 52737722. Its totient is φ = 52737720.

The previous prime is 52737701. The next prime is 52737743. The reversal of 52737721 is 12773725.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47073321 + 5664400 = 6861^2 + 2380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52737721 is a prime.

It is not a weakly prime, because it can be changed into another prime (52737701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26368860 + 26368861.

It is an arithmetic number, because the mean of its divisors is an integer number (26368861).

Almost surely, 2^52737721 is an apocalyptic number.

It is an amenable number.

52737721 is a deficient number, since it is larger than the sum of its proper divisors (1).

52737721 is an equidigital number, since it uses as much as digits as its factorization.

52737721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20580, while the sum is 34.

The square root of 52737721 is about 7262.0741527473. The cubic root of 52737721 is about 375.0079310915.

The spelling of 52737721 in words is "fifty-two million, seven hundred thirty-seven thousand, seven hundred twenty-one".