64690699 has 2 divisors, whose sum is σ = 64690700. Its totient is φ = 64690698.

The previous prime is 64690693. The next prime is 64690709. The reversal of 64690699 is 99609646.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64690699 - 2¹¹ = 64688651 is a prime.

It is not a weakly prime, because it can be changed into another prime (64690693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32345349 + 32345350.

It is an arithmetic number, because the mean of its divisors is an integer number (32345350).

Almost surely, 2^64690699 is an apocalyptic number.

64690699 is a deficient number, since it is larger than the sum of its proper divisors (1).

64690699 is an equidigital number, since it uses as much as digits as its factorization.

64690699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 64690699 is about 8043.0528408062. The cubic root of 64690699 is about 401.4338105771.

The spelling of 64690699 in words is "sixty-four million, six hundred ninety thousand, six hundred ninety-nine".