635412623 has 4 divisors (see below), whose sum is σ = 640416000. Its totient is φ = 630409248.

The previous prime is 635412541. The next prime is 635412643. The reversal of 635412623 is 326214536.

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

It is a cyclic number.

It is not a de Polignac number, because 635412623 - 2¹⁰ = 635411599 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 635412623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635412643) 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, 2501498 + ... + 2501751.

It is an arithmetic number, because the mean of its divisors is an integer number (160104000).

Almost surely, 2^635412623 is an apocalyptic number.

635412623 is a deficient number, since it is larger than the sum of its proper divisors (5003377).

635412623 is a wasteful number, since it uses less digits than its factorization.

635412623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5003376.

The product of its digits is 25920, while the sum is 32.

The square root of 635412623 is about 25207.3922292648. The cubic root of 635412623 is about 859.7099359792.

The spelling of 635412623 in words is "six hundred thirty-five million, four hundred twelve thousand, six hundred twenty-three".