64351947 has 16 divisors (see below), whose sum is σ = 94171392. Its totient is φ = 38764320.

The previous prime is 64351901. The next prime is 64351961. The reversal of 64351947 is 74915346.

It is not a de Polignac number, because 64351947 - 2¹¹ = 64349899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64351967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328 + ... + 11349.

It is an arithmetic number, because the mean of its divisors is an integer number (5885712).

Almost surely, 2^64351947 is an apocalyptic number.

64351947 is a deficient number, since it is larger than the sum of its proper divisors (29819445).

64351947 is a wasteful number, since it uses less digits than its factorization.

64351947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11858.

The product of its digits is 90720, while the sum is 39.

The square root of 64351947 is about 8021.9665294739. The cubic root of 64351947 is about 400.7318829682.

The spelling of 64351947 in words is "sixty-four million, three hundred fifty-one thousand, nine hundred forty-seven".