684006629 has 4 divisors (see below), whose sum is σ = 688927680. Its totient is φ = 679085580.

The previous prime is 684006607. The next prime is 684006641. The reversal of 684006629 is 926600486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 684006629 - 2¹² = 684002533 is a prime.

It is a super-3 number, since 3×684006629³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684006689) 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, 2460317 + ... + 2460594.

It is an arithmetic number, because the mean of its divisors is an integer number (172231920).

Almost surely, 2^684006629 is an apocalyptic number.

It is an amenable number.

684006629 is a deficient number, since it is larger than the sum of its proper divisors (4921051).

684006629 is a wasteful number, since it uses less digits than its factorization.

684006629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4921050.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 684006629 is about 26153.5203940120. The cubic root of 684006629 is about 881.0896578388.

The spelling of 684006629 in words is "six hundred eighty-four million, six thousand, six hundred twenty-nine".