1684897201 has 4 divisors (see below), whose sum is σ = 1814504692. Its totient is φ = 1555289712.

The previous prime is 1684897171. The next prime is 1684897271. The reversal of 1684897201 is 1027984861.

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

It can be written as a sum of positive squares in 2 ways, for example, as 919544976 + 765352225 = 30324^2 + 27665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684897201 - 2⁷ = 1684897073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1684897271) 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, 64803726 + ... + 64803751.

It is an arithmetic number, because the mean of its divisors is an integer number (453626173).

Almost surely, 2^1684897201 is an apocalyptic number.

It is an amenable number.

1684897201 is a deficient number, since it is larger than the sum of its proper divisors (129607491).

1684897201 is a wasteful number, since it uses less digits than its factorization.

1684897201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129607490.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 1684897201 is about 41047.4993269992. The cubic root of 1684897201 is about 1189.9383723940.

It can be divided in two parts, 168 and 4897201, that added together give a square (4897369 = 2213²).

The spelling of 1684897201 in words is "one billion, six hundred eighty-four million, eight hundred ninety-seven thousand, two hundred one".