53440637 has 2 divisors, whose sum is σ = 53440638. Its totient is φ = 53440636.

The previous prime is 53440613. The next prime is 53440657. The reversal of 53440637 is 73604435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53377636 + 63001 = 7306^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 53440637 - 2⁶ = 53440573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53440657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26720318 + 26720319.

It is an arithmetic number, because the mean of its divisors is an integer number (26720319).

Almost surely, 2^53440637 is an apocalyptic number.

It is an amenable number.

53440637 is a deficient number, since it is larger than the sum of its proper divisors (1).

53440637 is an equidigital number, since it uses as much as digits as its factorization.

53440637 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 53440637 is about 7310.3103217305. The cubic root of 53440637 is about 376.6666839829. Note that the first 4 decimals are identical.

The spelling of 53440637 in words is "fifty-three million, four hundred forty thousand, six hundred thirty-seven".