64609694 has 4 divisors (see below), whose sum is σ = 96914544. Its totient is φ = 32304846.

The previous prime is 64609669. The next prime is 64609697. The reversal of 64609694 is 49690646.

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: 49690646 = 2 ⋅24845323.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64609697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16152422 + ... + 16152425.

It is an arithmetic number, because the mean of its divisors is an integer number (24228636).

Almost surely, 2^64609694 is an apocalyptic number.

64609694 is a deficient number, since it is larger than the sum of its proper divisors (32304850).

64609694 is a wasteful number, since it uses less digits than its factorization.

64609694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32304849.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 64609694 is about 8038.0155511171. The cubic root of 64609694 is about 401.2661835523.

The spelling of 64609694 in words is "sixty-four million, six hundred nine thousand, six hundred ninety-four".