640592629 has 16 divisors (see below), whose sum is σ = 684573120. Its totient is φ = 598348800.

The previous prime is 640592627. The next prime is 640592633. The reversal of 640592629 is 926295046.

It is a cyclic number.

It is not a de Polignac number, because 640592629 - 2¹ = 640592627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640592621) 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 15 ways as a sum of consecutive naturals, for example, 131029 + ... + 135829.

It is an arithmetic number, because the mean of its divisors is an integer number (42785820).

Almost surely, 2^640592629 is an apocalyptic number.

It is an amenable number.

640592629 is a deficient number, since it is larger than the sum of its proper divisors (43980491).

640592629 is a wasteful number, since it uses less digits than its factorization.

640592629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4980.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 640592629 is about 25309.9314301718. The cubic root of 640592629 is about 862.0397898849.

The spelling of 640592629 in words is "six hundred forty million, five hundred ninety-two thousand, six hundred twenty-nine".