1684168425 has 18 divisors (see below), whose sum is σ = 3016533182. Its totient is φ = 898223040.

The previous prime is 1684168411. The next prime is 1684168441. The reversal of 1684168425 is 5248614861.

It is a happy number.

1684168425 is a `hidden beast` number, since 1 + 68 + 4 + 168 + 425 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 29550096 + 1654618329 = 5436^2 + 40677^2 .

It is not a de Polignac number, because 1684168425 - 2⁶ = 1684168361 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3742372 + ... + 3742821.

Almost surely, 2^1684168425 is an apocalyptic number.

1684168425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1684168425 is a deficient number, since it is larger than the sum of its proper divisors (1332364757).

1684168425 is a wasteful number, since it uses less digits than its factorization.

1684168425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7485209 (or 7485201 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 1684168425 is about 41038.6211391172. The cubic root of 1684168425 is about 1189.7667845591.

The spelling of 1684168425 in words is "one billion, six hundred eighty-four million, one hundred sixty-eight thousand, four hundred twenty-five".