64609099 has 4 divisors (see below), whose sum is σ = 64982736. Its totient is φ = 64235464.

The previous prime is 64609087. The next prime is 64609117. The reversal of 64609099 is 99090646.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99090646 = 2 ⋅49545323.

It is a cyclic number.

It is not a de Polignac number, because 64609099 - 2¹¹ = 64607051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64609009) 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 3 ways as a sum of consecutive naturals, for example, 186559 + ... + 186904.

It is an arithmetic number, because the mean of its divisors is an integer number (16245684).

Almost surely, 2^64609099 is an apocalyptic number.

64609099 is a deficient number, since it is larger than the sum of its proper divisors (373637).

64609099 is a wasteful number, since it uses less digits than its factorization.

64609099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373636.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 64609099 is about 8037.9785394090. The cubic root of 64609099 is about 401.2649517757.

The spelling of 64609099 in words is "sixty-four million, six hundred nine thousand, ninety-nine".