684299494 has 4 divisors (see below), whose sum is σ = 1026449244. Its totient is φ = 342149746.

The previous prime is 684299477. The next prime is 684299503. The reversal of 684299494 is 494992486.

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, 171074872 + ... + 171074875.

It is an arithmetic number, because the mean of its divisors is an integer number (256612311).

Almost surely, 2^684299494 is an apocalyptic number.

684299494 is a deficient number, since it is larger than the sum of its proper divisors (342149750).

684299494 is a wasteful number, since it uses less digits than its factorization.

684299494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342149749.

The product of its digits is 4478976, while the sum is 55.

The square root of 684299494 is about 26159.1187542700. The cubic root of 684299494 is about 881.2153893219.

The spelling of 684299494 in words is "six hundred eighty-four million, two hundred ninety-nine thousand, four hundred ninety-four".