64689701 has 2 divisors, whose sum is σ = 64689702. Its totient is φ = 64689700.

The previous prime is 64689689. The next prime is 64689761. The reversal of 64689701 is 10798646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40972801 + 23716900 = 6401^2 + 4870^2 .

It is a cyclic number.

It is not a de Polignac number, because 64689701 - 2⁶ = 64689637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64689761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32344850 + 32344851.

It is an arithmetic number, because the mean of its divisors is an integer number (32344851).

Almost surely, 2^64689701 is an apocalyptic number.

It is an amenable number.

64689701 is a deficient number, since it is larger than the sum of its proper divisors (1).

64689701 is an equidigital number, since it uses as much as digits as its factorization.

64689701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 64689701 is about 8042.9907994477. The cubic root of 64689701 is about 401.4317462258.

The spelling of 64689701 in words is "sixty-four million, six hundred eighty-nine thousand, seven hundred one".