194663957 has 4 divisors (see below), whose sum is σ = 206114796. Its totient is φ = 183213120.

The previous prime is 194663947. The next prime is 194663981. The reversal of 194663957 is 759366491.

194663957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 59197636 + 135466321 = 7694^2 + 11639^2 .

It is a cyclic number.

It is not a de Polignac number, because 194663957 - 2¹⁶ = 194598421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194663947) 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, 5725394 + ... + 5725427.

It is an arithmetic number, because the mean of its divisors is an integer number (51528699).

Almost surely, 2^194663957 is an apocalyptic number.

194663957 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

194663957 is a deficient number, since it is larger than the sum of its proper divisors (11450839).

194663957 is a wasteful number, since it uses less digits than its factorization.

194663957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11450838.

The product of its digits is 1224720, while the sum is 50.

The square root of 194663957 is about 13952.2025859719. The cubic root of 194663957 is about 579.5557011585. Note that the first 3 decimals are identical.

The spelling of 194663957 in words is "one hundred ninety-four million, six hundred sixty-three thousand, nine hundred fifty-seven".