684628901729 has 8 divisors (see below), whose sum is σ = 763053884640. Its totient is φ = 610443107136.

The previous prime is 684628901681. The next prime is 684628901731. The reversal of 684628901729 is 927109826486.

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

It is a cyclic number.

It is not a de Polignac number, because 684628901729 - 2¹² = 684628897633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684628901779) 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, 1059796739 + ... + 1059797384.

It is an arithmetic number, because the mean of its divisors is an integer number (95381735580).

Almost surely, 2^684628901729 is an apocalyptic number.

It is an amenable number.

684628901729 is a deficient number, since it is larger than the sum of its proper divisors (78424982911).

684628901729 is a wasteful number, since it uses less digits than its factorization.

684628901729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119594159.

The product of its (nonzero) digits is 20901888, while the sum is 62.

The spelling of 684628901729 in words is "six hundred eighty-four billion, six hundred twenty-eight million, nine hundred one thousand, seven hundred twenty-nine".