64745047 has 4 divisors (see below), whose sum is σ = 65239416. Its totient is φ = 64250680.

The previous prime is 64745041. The next prime is 64745099. The reversal of 64745047 is 74054746.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64745047 is a prime.

It is a super-2 number, since 2×64745047² = 8383842222064418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64744997 and 64745015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64745041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246988 + ... + 247249.

It is an arithmetic number, because the mean of its divisors is an integer number (16309854).

Almost surely, 2^64745047 is an apocalyptic number.

64745047 is a deficient number, since it is larger than the sum of its proper divisors (494369).

64745047 is a wasteful number, since it uses less digits than its factorization.

64745047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494368.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 64745047 is about 8046.4306993847. The cubic root of 64745047 is about 401.5461967380.

The spelling of 64745047 in words is "sixty-four million, seven hundred forty-five thousand, forty-seven".