64947994 has 8 divisors (see below), whose sum is σ = 100781460. Its totient is φ = 31354176.

The previous prime is 64947959. The next prime is 64947997. The reversal of 64947994 is 49974946.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61387225 + 3560769 = 7835^2 + 1887^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64947997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559839 + ... + 559954.

Almost surely, 2^64947994 is an apocalyptic number.

64947994 is a deficient number, since it is larger than the sum of its proper divisors (35833466).

64947994 is a wasteful number, since it uses less digits than its factorization.

64947994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119824.

The product of its digits is 1959552, while the sum is 52.

The square root of 64947994 is about 8059.0318277073. The cubic root of 64947994 is about 401.9653155227.

The spelling of 64947994 in words is "sixty-four million, nine hundred forty-seven thousand, nine hundred ninety-four".