64974547 has 8 divisors (see below), whose sum is σ = 74612160. Its totient is φ = 55958760.

The previous prime is 64974499. The next prime is 64974551. The reversal of 64974547 is 74547946.

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

It is not a de Polignac number, because 64974547 - 2¹⁹ = 64450259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64974497 and 64974506.

It is not an unprimeable number, because it can be changed into a prime (64974557) 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 7 ways as a sum of consecutive naturals, for example, 155233 + ... + 155650.

It is an arithmetic number, because the mean of its divisors is an integer number (9326520).

Almost surely, 2^64974547 is an apocalyptic number.

64974547 is a deficient number, since it is larger than the sum of its proper divisors (9637613).

64974547 is a wasteful number, since it uses less digits than its factorization.

64974547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310913.

The product of its digits is 846720, while the sum is 46.

The square root of 64974547 is about 8060.6790656867. The cubic root of 64974547 is about 402.0200871954.

The spelling of 64974547 in words is "sixty-four million, nine hundred seventy-four thousand, five hundred forty-seven".