194430825 has 18 divisors (see below), whose sum is σ = 348247614. Its totient is φ = 103696320.

The previous prime is 194430823. The next prime is 194430827. The reversal of 194430825 is 528034491.

It is an interprime number because it is at equal distance from previous prime (194430823) and next prime (194430827).

It can be written as a sum of positive squares in 3 ways, for example, as 4652649 + 189778176 = 2157^2 + 13776^2 .

It is not a de Polignac number, because 194430825 - 2¹ = 194430823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194430825.

It is not an unprimeable number, because it can be changed into a prime (194430823) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 431844 + ... + 432293.

Almost surely, 2^194430825 is an apocalyptic number.

194430825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

194430825 is a deficient number, since it is larger than the sum of its proper divisors (153816789).

194430825 is a wasteful number, since it uses less digits than its factorization.

194430825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864153 (or 864145 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 194430825 is about 13943.8454165270. The cubic root of 194430825 is about 579.3242476743.

The spelling of 194430825 in words is "one hundred ninety-four million, four hundred thirty thousand, eight hundred twenty-five".