1684247342 has 4 divisors (see below), whose sum is σ = 2526371016. Its totient is φ = 842123670.

The previous prime is 1684247321. The next prime is 1684247347. The reversal of 1684247342 is 2437424861.

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

It is a super-3 number, since 3×1684247342³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1684247342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1684247347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421061834 + ... + 421061837.

It is an arithmetic number, because the mean of its divisors is an integer number (631592754).

Almost surely, 2^1684247342 is an apocalyptic number.

1684247342 is a deficient number, since it is larger than the sum of its proper divisors (842123674).

1684247342 is an equidigital number, since it uses as much as digits as its factorization.

1684247342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842123673.

The product of its digits is 258048, while the sum is 41.

The square root of 1684247342 is about 41039.5826245833. The cubic root of 1684247342 is about 1189.7853676884.

The spelling of 1684247342 in words is "one billion, six hundred eighty-four million, two hundred forty-seven thousand, three hundred forty-two".