64697293 has 4 divisors (see below), whose sum is σ = 64727100. Its totient is φ = 64667488.

The previous prime is 64697273. The next prime is 64697317. The reversal of 64697293 is 39279646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29615364 + 35081929 = 5442^2 + 5923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64697293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64697203) 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, 11368 + ... + 16081.

It is an arithmetic number, because the mean of its divisors is an integer number (16181775).

Almost surely, 2^64697293 is an apocalyptic number.

It is an amenable number.

64697293 is a deficient number, since it is larger than the sum of its proper divisors (29807).

64697293 is a wasteful number, since it uses less digits than its factorization.

64697293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29806.

The product of its digits is 489888, while the sum is 46.

The square root of 64697293 is about 8043.4627493387. The cubic root of 64697293 is about 401.4474496559.

The spelling of 64697293 in words is "sixty-four million, six hundred ninety-seven thousand, two hundred ninety-three".