685229601 has 32 divisors (see below), whose sum is σ = 1061164800. Its totient is φ = 385228800.

The previous prime is 685229561. The next prime is 685229609. The reversal of 685229601 is 106922586.

685229601 = T₁ + T₂ + ... + T₁₆₀₁.

685229601 is a nontrivial binomial coefficient, being equal to C(1603, 3).

It is not a de Polignac number, because 685229601 - 2⁷ = 685229473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685229601.

It is not an unprimeable number, because it can be changed into a prime (685229609) by changing a digit.

It is the 1601-st tetrahedral number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427201 + ... + 428801.

It is an arithmetic number, because the mean of its divisors is an integer number (33161400).

Almost surely, 2^685229601 is an apocalyptic number.

It is an amenable number.

685229601 is a deficient number, since it is larger than the sum of its proper divisors (375935199).

685229601 is a wasteful number, since it uses less digits than its factorization.

685229601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 685229601 is about 26176.8905907482. The cubic root of 685229601 is about 881.6144609477.

The spelling of 685229601 in words is "six hundred eighty-five million, two hundred twenty-nine thousand, six hundred one".