683400985 has 8 divisors (see below), whose sum is σ = 820235016. Its totient is φ = 546618240.

The previous prime is 683400941. The next prime is 683401013. The reversal of 683400985 is 589004386.

It can be written as a sum of positive squares in 4 ways, for example, as 154032921 + 529368064 = 12411^2 + 23008^2 .

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

It is not a de Polignac number, because 683400985 - 2¹⁹ = 682876697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28767 + ... + 46843.

It is an arithmetic number, because the mean of its divisors is an integer number (102529377).

Almost surely, 2^683400985 is an apocalyptic number.

It is an amenable number.

683400985 is a deficient number, since it is larger than the sum of its proper divisors (136834031).

683400985 is a wasteful number, since it uses less digits than its factorization.

683400985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25643.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 683400985 is about 26141.9391973893. The cubic root of 683400985 is about 880.8295315881.

The spelling of 683400985 in words is "six hundred eighty-three million, four hundred thousand, nine hundred eighty-five".