65437613 has 2 divisors, whose sum is σ = 65437614. Its totient is φ = 65437612.

The previous prime is 65437591. The next prime is 65437633. The reversal of 65437613 is 31673456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52027369 + 13410244 = 7213^2 + 3662^2 .

It is a cyclic number.

It is not a de Polignac number, because 65437613 - 2¹² = 65433517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65437633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32718806 + 32718807.

It is an arithmetic number, because the mean of its divisors is an integer number (32718807).

Almost surely, 2^65437613 is an apocalyptic number.

It is an amenable number.

65437613 is a deficient number, since it is larger than the sum of its proper divisors (1).

65437613 is an equidigital number, since it uses as much as digits as its factorization.

65437613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 35.

The square root of 65437613 is about 8089.3518281751. The cubic root of 65437613 is about 402.9728773459.

The spelling of 65437613 in words is "sixty-five million, four hundred thirty-seven thousand, six hundred thirteen".