64703609 has 2 divisors, whose sum is σ = 64703610. Its totient is φ = 64703608.

The previous prime is 64703567. The next prime is 64703621. The reversal of 64703609 is 90630746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39100009 + 25603600 = 6253^2 + 5060^2 .

It is a cyclic number.

It is not a de Polignac number, because 64703609 - 2¹² = 64699513 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64703659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32351804 + 32351805.

It is an arithmetic number, because the mean of its divisors is an integer number (32351805).

Almost surely, 2^64703609 is an apocalyptic number.

It is an amenable number.

64703609 is a deficient number, since it is larger than the sum of its proper divisors (1).

64703609 is an equidigital number, since it uses as much as digits as its factorization.

64703609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 64703609 is about 8043.8553567304. The cubic root of 64703609 is about 401.4605128484.

The spelling of 64703609 in words is "sixty-four million, seven hundred three thousand, six hundred nine".