64973537 has 2 divisors, whose sum is σ = 64973538. Its totient is φ = 64973536.

The previous prime is 64973527. The next prime is 64973549. The reversal of 64973537 is 73537946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55338721 + 9634816 = 7439^2 + 3104^2 .

It is a cyclic number.

It is not a de Polignac number, because 64973537 - 2¹² = 64969441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64973527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32486768 + 32486769.

It is an arithmetic number, because the mean of its divisors is an integer number (32486769).

Almost surely, 2^64973537 is an apocalyptic number.

It is an amenable number.

64973537 is a deficient number, since it is larger than the sum of its proper divisors (1).

64973537 is an equidigital number, since it uses as much as digits as its factorization.

64973537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 44.

The square root of 64973537 is about 8060.6164156347. The cubic root of 64973537 is about 402.0180041110.

The spelling of 64973537 in words is "sixty-four million, nine hundred seventy-three thousand, five hundred thirty-seven".