64537297 has 4 divisors (see below), whose sum is σ = 70404336. Its totient is φ = 58670260.

The previous prime is 64537279. The next prime is 64537303. The reversal of 64537297 is 79273546.

64537297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-64537297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64537097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2933503 + ... + 2933524.

It is an arithmetic number, because the mean of its divisors is an integer number (17601084).

Almost surely, 2^64537297 is an apocalyptic number.

It is an amenable number.

64537297 is a deficient number, since it is larger than the sum of its proper divisors (5867039).

64537297 is a wasteful number, since it uses less digits than its factorization.

64537297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867038.

The product of its digits is 317520, while the sum is 43.

The square root of 64537297 is about 8033.5108763230. The cubic root of 64537297 is about 401.1162508127.

The spelling of 64537297 in words is "sixty-four million, five hundred thirty-seven thousand, two hundred ninety-seven".