64398497 has 4 divisors (see below), whose sum is σ = 64578240. Its totient is φ = 64218756.

The previous prime is 64398487. The next prime is 64398511. The reversal of 64398497 is 79489346.

64398497 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, and also an emirpimes, since its reverse is a distinct semiprime: 79489346 = 2 ⋅39744673.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64398497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64398407) 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, 89333 + ... + 90050.

It is an arithmetic number, because the mean of its divisors is an integer number (16144560).

Almost surely, 2^64398497 is an apocalyptic number.

It is an amenable number.

64398497 is a deficient number, since it is larger than the sum of its proper divisors (179743).

64398497 is a wasteful number, since it uses less digits than its factorization.

64398497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179742.

The product of its digits is 1306368, while the sum is 50.

The square root of 64398497 is about 8024.8674132349. The cubic root of 64398497 is about 400.8284849304.

The spelling of 64398497 in words is "sixty-four million, three hundred ninety-eight thousand, four hundred ninety-seven".