623085641 has 4 divisors (see below), whose sum is σ = 623369412. Its totient is φ = 622801872.

The previous prime is 623085613. The next prime is 623085643. The reversal of 623085641 is 146580326.

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 509450041 + 113635600 = 22571^2 + 10660^2 .

It is a cyclic number.

It is not a de Polignac number, because 623085641 - 2⁶ = 623085577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623085643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138566 + ... + 142991.

It is an arithmetic number, because the mean of its divisors is an integer number (155842353).

Almost surely, 2^623085641 is an apocalyptic number.

It is an amenable number.

623085641 is a deficient number, since it is larger than the sum of its proper divisors (283771).

623085641 is a wasteful number, since it uses less digits than its factorization.

623085641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283770.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 623085641 is about 24961.6834568504. The cubic root of 623085641 is about 854.1141451341.

The spelling of 623085641 in words is "six hundred twenty-three million, eighty-five thousand, six hundred forty-one".