64115047 has 4 divisors (see below), whose sum is σ = 65072056. Its totient is φ = 63158040.

The previous prime is 64115039. The next prime is 64115069. The reversal of 64115047 is 74051146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64115047 - 2³ = 64115039 is a prime.

It is a super-2 number, since 2×64115047² = 8221478503624418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64115647) 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, 478404 + ... + 478537.

It is an arithmetic number, because the mean of its divisors is an integer number (16268014).

Almost surely, 2^64115047 is an apocalyptic number.

64115047 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

64115047 is a deficient number, since it is larger than the sum of its proper divisors (957009).

64115047 is an equidigital number, since it uses as much as digits as its factorization.

64115047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957008.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 64115047 is about 8007.1872090017. The cubic root of 64115047 is about 400.2395377755.

The spelling of 64115047 in words is "sixty-four million, one hundred fifteen thousand, forty-seven".