194897057 has 2 divisors, whose sum is σ = 194897058. Its totient is φ = 194897056.

The previous prime is 194897051. The next prime is 194897069. The reversal of 194897057 is 750798491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142826401 + 52070656 = 11951^2 + 7216^2 .

It is a cyclic number.

It is not a de Polignac number, because 194897057 - 2¹⁶ = 194831521 is a prime.

It is a super-2 number, since 2×194897057² = 75969725654522498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 194896996 and 194897014.

It is not a weakly prime, because it can be changed into another prime (194897051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97448528 + 97448529.

It is an arithmetic number, because the mean of its divisors is an integer number (97448529).

Almost surely, 2^194897057 is an apocalyptic number.

It is an amenable number.

194897057 is a deficient number, since it is larger than the sum of its proper divisors (1).

194897057 is an equidigital number, since it uses as much as digits as its factorization.

194897057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 194897057 is about 13960.5536065014. The cubic root of 194897057 is about 579.7869381904.

The spelling of 194897057 in words is "one hundred ninety-four million, eight hundred ninety-seven thousand, fifty-seven".