194869057 has 2 divisors, whose sum is σ = 194869058. Its totient is φ = 194869056.

The previous prime is 194869049. The next prime is 194869091. The reversal of 194869057 is 750968491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194853681 + 15376 = 13959^2 + 124^2 .

It is a cyclic number.

It is not a de Polignac number, because 194869057 - 2³ = 194869049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194869057.

It is not a weakly prime, because it can be changed into another prime (194869457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97434528 + 97434529.

It is an arithmetic number, because the mean of its divisors is an integer number (97434529).

Almost surely, 2^194869057 is an apocalyptic number.

It is an amenable number.

194869057 is a deficient number, since it is larger than the sum of its proper divisors (1).

194869057 is an equidigital number, since it uses as much as digits as its factorization.

194869057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 194869057 is about 13959.5507449201. The cubic root of 194869057 is about 579.7591717172.

The spelling of 194869057 in words is "one hundred ninety-four million, eight hundred sixty-nine thousand, fifty-seven".