1684359361 has 4 divisors (see below), whose sum is σ = 1684515924. Its totient is φ = 1684202800.

The previous prime is 1684359343. The next prime is 1684359377. The reversal of 1684359361 is 1639534861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1639534861 = 37 ⋅44311753.

It can be written as a sum of positive squares in 2 ways, for example, as 151167025 + 1533192336 = 12295^2 + 39156^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684359361 - 2⁹ = 1684358849 is a prime.

It is a super-3 number, since 3×1684359361³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1684359311) 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, 60850 + ... + 84091.

It is an arithmetic number, because the mean of its divisors is an integer number (421128981).

Almost surely, 2^1684359361 is an apocalyptic number.

It is an amenable number.

1684359361 is a deficient number, since it is larger than the sum of its proper divisors (156563).

1684359361 is a wasteful number, since it uses less digits than its factorization.

1684359361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156562.

The product of its digits is 466560, while the sum is 46.

The square root of 1684359361 is about 41040.9473696697. The cubic root of 1684359361 is about 1189.8117445768.

The spelling of 1684359361 in words is "one billion, six hundred eighty-four million, three hundred fifty-nine thousand, three hundred sixty-one".