52640437 has 2 divisors, whose sum is σ = 52640438. Its totient is φ = 52640436.

The previous prime is 52640417. The next prime is 52640443. The reversal of 52640437 is 73404625.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36108081 + 16532356 = 6009^2 + 4066^2 .

It is a cyclic number.

It is not a de Polignac number, because 52640437 - 2⁷ = 52640309 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 52640399 and 52640408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52640417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26320218 + 26320219.

It is an arithmetic number, because the mean of its divisors is an integer number (26320219).

Almost surely, 2^52640437 is an apocalyptic number.

It is an amenable number.

52640437 is a deficient number, since it is larger than the sum of its proper divisors (1).

52640437 is an equidigital number, since it uses as much as digits as its factorization.

52640437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 52640437 is about 7255.3729745617. The cubic root of 52640437 is about 374.7771998012. Note that the first 3 decimals are identical.

The spelling of 52640437 in words is "fifty-two million, six hundred forty thousand, four hundred thirty-seven".