64609699 has 8 divisors (see below), whose sum is σ = 80552448. Its totient is φ = 50345160.

The previous prime is 64609697. The next prime is 64609711. The reversal of 64609699 is 99690646.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64609699 - 2¹ = 64609697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64609697) 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 in 7 ways as a sum of consecutive naturals, for example, 419467 + ... + 419620.

It is an arithmetic number, because the mean of its divisors is an integer number (10069056).

Almost surely, 2^64609699 is an apocalyptic number.

64609699 is a deficient number, since it is larger than the sum of its proper divisors (15942749).

64609699 is a wasteful number, since it uses less digits than its factorization.

64609699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839105.

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

The square root of 64609699 is about 8038.0158621391. The cubic root of 64609699 is about 401.2661939033.

The spelling of 64609699 in words is "sixty-four million, six hundred nine thousand, six hundred ninety-nine".