64409497 has 4 divisors (see below), whose sum is σ = 64509696. Its totient is φ = 64309300.

The previous prime is 64409491. The next prime is 64409507. The reversal of 64409497 is 79490446.

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 cyclic number.

It is not a de Polignac number, because 64409497 - 2¹¹ = 64407449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64409491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49129 + ... + 50422.

It is an arithmetic number, because the mean of its divisors is an integer number (16127424).

Almost surely, 2^64409497 is an apocalyptic number.

It is an amenable number.

64409497 is a deficient number, since it is larger than the sum of its proper divisors (100199).

64409497 is an equidigital number, since it uses as much as digits as its factorization.

64409497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100198.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 64409497 is about 8025.5527535491. The cubic root of 64409497 is about 400.8513056613.

The spelling of 64409497 in words is "sixty-four million, four hundred nine thousand, four hundred ninety-seven".