685748542 has 8 divisors (see below), whose sum is σ = 1073345616. Its totient is φ = 327966672.

The previous prime is 685748521. The next prime is 685748549. The reversal of 685748542 is 245847586.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685748549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7453743 + ... + 7453834.

It is an arithmetic number, because the mean of its divisors is an integer number (134168202).

Almost surely, 2^685748542 is an apocalyptic number.

685748542 is a deficient number, since it is larger than the sum of its proper divisors (387597074).

685748542 is a wasteful number, since it uses less digits than its factorization.

685748542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14907602.

The product of its digits is 2150400, while the sum is 49.

The square root of 685748542 is about 26186.8009119098. The cubic root of 685748542 is about 881.8369607952.

The spelling of 685748542 in words is "six hundred eighty-five million, seven hundred forty-eight thousand, five hundred forty-two".