64681147 has 8 divisors (see below), whose sum is σ = 66110256. Its totient is φ = 63259872.

The previous prime is 64681121. The next prime is 64681151. The reversal of 64681147 is 74118646.

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 64681147 - 2¹⁵ = 64648379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64681117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16633 + ... + 20149.

It is an arithmetic number, because the mean of its divisors is an integer number (8263782).

Almost surely, 2^64681147 is an apocalyptic number.

64681147 is a deficient number, since it is larger than the sum of its proper divisors (1429109).

64681147 is a wasteful number, since it uses less digits than its factorization.

64681147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917.

The product of its digits is 32256, while the sum is 37.

The square root of 64681147 is about 8042.4590145055. The cubic root of 64681147 is about 401.4140515053.

The spelling of 64681147 in words is "sixty-four million, six hundred eighty-one thousand, one hundred forty-seven".