194240357 has 2 divisors, whose sum is σ = 194240358. Its totient is φ = 194240356.

The previous prime is 194240353. The next prime is 194240369. The reversal of 194240357 is 753042491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154977601 + 39262756 = 12449^2 + 6266^2 .

It is an emirp because it is prime and its reverse (753042491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194240357 - 2² = 194240353 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194240353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97120178 + 97120179.

It is an arithmetic number, because the mean of its divisors is an integer number (97120179).

Almost surely, 2^194240357 is an apocalyptic number.

It is an amenable number.

194240357 is a deficient number, since it is larger than the sum of its proper divisors (1).

194240357 is an equidigital number, since it uses as much as digits as its factorization.

194240357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 194240357 is about 13937.0139197749. The cubic root of 194240357 is about 579.1350136512.

The spelling of 194240357 in words is "one hundred ninety-four million, two hundred forty thousand, three hundred fifty-seven".