64651733 has 2 divisors, whose sum is σ = 64651734. Its totient is φ = 64651732.

The previous prime is 64651703. The next prime is 64651739. The reversal of 64651733 is 33715646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36699364 + 27952369 = 6058^2 + 5287^2 .

It is a cyclic number.

It is not a de Polignac number, because 64651733 - 2²⁰ = 63603157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64651693 and 64651702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64651739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32325866 + 32325867.

It is an arithmetic number, because the mean of its divisors is an integer number (32325867).

Almost surely, 2^64651733 is an apocalyptic number.

It is an amenable number.

64651733 is a deficient number, since it is larger than the sum of its proper divisors (1).

64651733 is an equidigital number, since it uses as much as digits as its factorization.

64651733 is an evil number, because the sum of its binary digits is even.

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

The square root of 64651733 is about 8040.6301369980. The cubic root of 64651733 is about 401.3531940855.

The spelling of 64651733 in words is "sixty-four million, six hundred fifty-one thousand, seven hundred thirty-three".