685564094 has 4 divisors (see below), whose sum is σ = 1028346144. Its totient is φ = 342782046.

The previous prime is 685564079. The next prime is 685564123. The reversal of 685564094 is 490465586.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171391022 + ... + 171391025.

It is an arithmetic number, because the mean of its divisors is an integer number (257086536).

Almost surely, 2^685564094 is an apocalyptic number.

685564094 is a deficient number, since it is larger than the sum of its proper divisors (342782050).

685564094 is a wasteful number, since it uses less digits than its factorization.

685564094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342782049.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The square root of 685564094 is about 26183.2789008558. The cubic root of 685564094 is about 881.7578901937.

The spelling of 685564094 in words is "six hundred eighty-five million, five hundred sixty-four thousand, ninety-four".