685719629 has 16 divisors (see below), whose sum is σ = 803851776. Its totient is φ = 572668800.

The previous prime is 685719623. The next prime is 685719649. The reversal of 685719629 is 926917586.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685719629 is a prime.

It is a super-2 number, since 2×685719629² = 940422819191795282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685719623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365564 + ... + 367434.

It is an arithmetic number, because the mean of its divisors is an integer number (50240736).

Almost surely, 2^685719629 is an apocalyptic number.

It is an amenable number.

685719629 is a deficient number, since it is larger than the sum of its proper divisors (118132147).

685719629 is a wasteful number, since it uses less digits than its factorization.

685719629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196.

The product of its digits is 1632960, while the sum is 53.

The square root of 685719629 is about 26186.2488531672. The cubic root of 685719629 is about 881.8245670829.

The spelling of 685719629 in words is "six hundred eighty-five million, seven hundred nineteen thousand, six hundred twenty-nine".