680537123 has 8 divisors (see below), whose sum is σ = 778305792. Its totient is φ = 582905736.

The previous prime is 680537101. The next prime is 680537153. The reversal of 680537123 is 321735086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 680537123 - 2²⁴ = 663759907 is a prime.

It is a super-2 number, since 2×680537123² = 926261551562234258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680537153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23465 + ... + 43722.

It is an arithmetic number, because the mean of its divisors is an integer number (97288224).

Almost surely, 2^680537123 is an apocalyptic number.

680537123 is a deficient number, since it is larger than the sum of its proper divisors (97768669).

680537123 is a wasteful number, since it uses less digits than its factorization.

680537123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68641.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 680537123 is about 26087.1064512721. The cubic root of 680537123 is about 879.5974066677.

The spelling of 680537123 in words is "six hundred eighty million, five hundred thirty-seven thousand, one hundred twenty-three".