1685707994 has 8 divisors (see below), whose sum is σ = 2534024640. Its totient is φ = 841033116.

The previous prime is 1685707993. The next prime is 1685708029. The reversal of 1685707994 is 4997075861.

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

It is a super-2 number, since 2×1685707994² = 5683222882071008072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1685707993) 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, 909284 + ... + 911135.

It is an arithmetic number, because the mean of its divisors is an integer number (316753080).

Almost surely, 2^1685707994 is an apocalyptic number.

1685707994 is a deficient number, since it is larger than the sum of its proper divisors (848316646).

1685707994 is a wasteful number, since it uses less digits than its factorization.

1685707994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820884.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The square root of 1685707994 is about 41057.3744167841. The cubic root of 1685707994 is about 1190.1292127188.

The spelling of 1685707994 in words is "one billion, six hundred eighty-five million, seven hundred seven thousand, nine hundred ninety-four".