194821625 has 8 divisors (see below), whose sum is σ = 243137544. Its totient is φ = 155857200.

The previous prime is 194821619. The next prime is 194821633. The reversal of 194821625 is 526128491.

It can be written as a sum of positive squares in 4 ways, for example, as 34140649 + 160680976 = 5843^2 + 12676^2 .

It is not a de Polignac number, because 194821625 - 2⁴ = 194821609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779162 + ... + 779411.

It is an arithmetic number, because the mean of its divisors is an integer number (30392193).

Almost surely, 2^194821625 is an apocalyptic number.

It is an amenable number.

194821625 is a deficient number, since it is larger than the sum of its proper divisors (48315919).

194821625 is an equidigital number, since it uses as much as digits as its factorization.

194821625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558588 (or 1558578 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 194821625 is about 13957.8517329853. The cubic root of 194821625 is about 579.7121292418.

The spelling of 194821625 in words is "one hundred ninety-four million, eight hundred twenty-one thousand, six hundred twenty-five".