685222629 has 32 divisors (see below), whose sum is σ = 1128013824. Its totient is φ = 360296640.

The previous prime is 685222613. The next prime is 685222661. The reversal of 685222629 is 926222586.

It is not a de Polignac number, because 685222629 - 2⁴ = 685222613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685222679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86572 + ... + 94154.

It is an arithmetic number, because the mean of its divisors is an integer number (35250432).

Almost surely, 2^685222629 is an apocalyptic number.

It is an amenable number.

685222629 is a deficient number, since it is larger than the sum of its proper divisors (442791195).

685222629 is a wasteful number, since it uses less digits than its factorization.

685222629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7937.

The product of its digits is 207360, while the sum is 42.

The square root of 685222629 is about 26176.7574195124. The cubic root of 685222629 is about 881.6114708858.

The spelling of 685222629 in words is "six hundred eighty-five million, two hundred twenty-two thousand, six hundred twenty-nine".