680390623 has 12 divisors (see below), whose sum is σ = 780386544. Its totient is φ = 591641600.

The previous prime is 680390621. The next prime is 680390629. The reversal of 680390623 is 326093086.

It is a happy number.

It is not a de Polignac number, because 680390623 - 2¹ = 680390621 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 (680390621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119458 + ... + 125023.

It is an arithmetic number, because the mean of its divisors is an integer number (65032212).

Almost surely, 2^680390623 is an apocalyptic number.

680390623 is a deficient number, since it is larger than the sum of its proper divisors (99995921).

680390623 is a wasteful number, since it uses less digits than its factorization.

680390623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244526 (or 244515 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 680390623 is about 26084.2983996120. The cubic root of 680390623 is about 879.5342848269.

The spelling of 680390623 in words is "six hundred eighty million, three hundred ninety thousand, six hundred twenty-three".