64069947 has 20 divisors (see below), whose sum is σ = 97285936. Its totient is φ = 42009840.

The previous prime is 64069937. The next prime is 64069981. The reversal of 64069947 is 74996046.

It is not a de Polignac number, because 64069947 - 2⁴ = 64069931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64069937) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1543 + ... + 11424.

Almost surely, 2^64069947 is an apocalyptic number.

64069947 is a deficient number, since it is larger than the sum of its proper divisors (33215989).

64069947 is a wasteful number, since it uses less digits than its factorization.

64069947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13040 (or 13031 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 64069947 is about 8004.3704936741. The cubic root of 64069947 is about 400.1456698610.

The spelling of 64069947 in words is "sixty-four million, sixty-nine thousand, nine hundred forty-seven".