684249094 has 4 divisors (see below), whose sum is σ = 1026373644. Its totient is φ = 342124546.

The previous prime is 684249089. The next prime is 684249107. The reversal of 684249094 is 490942486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 490942486 = 2 ⋅245471243.

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, 171062272 + ... + 171062275.

It is an arithmetic number, because the mean of its divisors is an integer number (256593411).

Almost surely, 2^684249094 is an apocalyptic number.

684249094 is a deficient number, since it is larger than the sum of its proper divisors (342124550).

684249094 is a wasteful number, since it uses less digits than its factorization.

684249094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342124549.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 684249094 is about 26158.1554013275. The cubic root of 684249094 is about 881.1937543768.

The spelling of 684249094 in words is "six hundred eighty-four million, two hundred forty-nine thousand, ninety-four".