64297491 has 8 divisors (see below), whose sum is σ = 85805520. Its totient is φ = 42827232.

The previous prime is 64297487. The next prime is 64297511. The reversal of 64297491 is 19479246.

64297491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 64297491 - 2² = 64297487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64297481) 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 7 ways as a sum of consecutive naturals, for example, 5196 + ... + 12473.

It is an arithmetic number, because the mean of its divisors is an integer number (10725690).

Almost surely, 2^64297491 is an apocalyptic number.

64297491 is a deficient number, since it is larger than the sum of its proper divisors (21508029).

64297491 is a wasteful number, since it uses less digits than its factorization.

64297491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18885.

The product of its digits is 108864, while the sum is 42.

The square root of 64297491 is about 8018.5716309078. The cubic root of 64297491 is about 400.6188150927.

The spelling of 64297491 in words is "sixty-four million, two hundred ninety-seven thousand, four hundred ninety-one".