53440613 has 2 divisors, whose sum is σ = 53440614. Its totient is φ = 53440612.

The previous prime is 53440609. The next prime is 53440637. The reversal of 53440613 is 31604435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43467649 + 9972964 = 6593^2 + 3158^2 .

It is a cyclic number.

It is not a de Polignac number, because 53440613 - 2² = 53440609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53440693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26720306 + 26720307.

It is an arithmetic number, because the mean of its divisors is an integer number (26720307).

Almost surely, 2^53440613 is an apocalyptic number.

It is an amenable number.

53440613 is a deficient number, since it is larger than the sum of its proper divisors (1).

53440613 is an equidigital number, since it uses as much as digits as its factorization.

53440613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 53440613 is about 7310.3086802132. The cubic root of 53440613 is about 376.6666275963. Note that the first 4 decimals are identical.

The spelling of 53440613 in words is "fifty-three million, four hundred forty thousand, six hundred thirteen".