64963909 has 2 divisors, whose sum is σ = 64963910. Its totient is φ = 64963908.

The previous prime is 64963883. The next prime is 64963939. The reversal of 64963909 is 90936946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42211009 + 22752900 = 6497^2 + 4770^2 .

It is a cyclic number.

It is not a de Polignac number, because 64963909 - 2⁹ = 64963397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64963939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32481954 + 32481955.

It is an arithmetic number, because the mean of its divisors is an integer number (32481955).

Almost surely, 2^64963909 is an apocalyptic number.

It is an amenable number.

64963909 is a deficient number, since it is larger than the sum of its proper divisors (1).

64963909 is an equidigital number, since it uses as much as digits as its factorization.

64963909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 64963909 is about 8060.0191687117. The cubic root of 64963909 is about 401.9981456644.

The spelling of 64963909 in words is "sixty-four million, nine hundred sixty-three thousand, nine hundred nine".