194394625 has 8 divisors (see below), whose sum is σ = 242604648. Its totient is φ = 155515600.

The previous prime is 194394611. The next prime is 194394637. The reversal of 194394625 is 526493491.

It can be written as a sum of positive squares in 4 ways, for example, as 28912129 + 165482496 = 5377^2 + 12864^2 .

It is not a de Polignac number, because 194394625 - 2⁹ = 194394113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777454 + ... + 777703.

It is an arithmetic number, because the mean of its divisors is an integer number (30325581).

Almost surely, 2^194394625 is an apocalyptic number.

It is an amenable number.

194394625 is a deficient number, since it is larger than the sum of its proper divisors (48210023).

194394625 is an equidigital number, since it uses as much as digits as its factorization.

194394625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555172 (or 1555162 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 194394625 is about 13942.5472923709. The cubic root of 194394625 is about 579.2882917168.

The spelling of 194394625 in words is "one hundred ninety-four million, three hundred ninety-four thousand, six hundred twenty-five".