640077301 has 4 divisors (see below), whose sum is σ = 673765600. Its totient is φ = 606389004.

The previous prime is 640077293. The next prime is 640077323. The reversal of 640077301 is 103770046.

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: 103770046 = 2 ⋅51885023.

It is a cyclic number.

It is not a de Polignac number, because 640077301 - 2³ = 640077293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 640077301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640077391) 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, 16844121 + ... + 16844158.

It is an arithmetic number, because the mean of its divisors is an integer number (168441400).

Almost surely, 2^640077301 is an apocalyptic number.

It is an amenable number.

640077301 is a deficient number, since it is larger than the sum of its proper divisors (33688299).

640077301 is a wasteful number, since it uses less digits than its factorization.

640077301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33688298.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 640077301 is about 25299.7490303758. The cubic root of 640077301 is about 861.8085704401.

The spelling of 640077301 in words is "six hundred forty million, seventy-seven thousand, three hundred one".