53640437 has 2 divisors, whose sum is σ = 53640438. Its totient is φ = 53640436.

The previous prime is 53640427. The next prime is 53640451. The reversal of 53640437 is 73404635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32194276 + 21446161 = 5674^2 + 4631^2 .

It is a cyclic number.

It is not a de Polignac number, because 53640437 - 2⁴ = 53640421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53640407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26820218 + 26820219.

It is an arithmetic number, because the mean of its divisors is an integer number (26820219).

Almost surely, 2^53640437 is an apocalyptic number.

It is an amenable number.

53640437 is a deficient number, since it is larger than the sum of its proper divisors (1).

53640437 is an equidigital number, since it uses as much as digits as its factorization.

53640437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 53640437 is about 7323.9632030752. The cubic root of 53640437 is about 377.1355182650.

The spelling of 53640437 in words is "fifty-three million, six hundred forty thousand, four hundred thirty-seven".