194109761 has 2 divisors, whose sum is σ = 194109762. Its totient is φ = 194109760.

The previous prime is 194109749. The next prime is 194109781. The reversal of 194109761 is 167901491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101103025 + 93006736 = 10055^2 + 9644^2 .

It is a cyclic number.

It is not a de Polignac number, because 194109761 - 2¹⁴ = 194093377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194109781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97054880 + 97054881.

It is an arithmetic number, because the mean of its divisors is an integer number (97054881).

Almost surely, 2^194109761 is an apocalyptic number.

It is an amenable number.

194109761 is a deficient number, since it is larger than the sum of its proper divisors (1).

194109761 is an equidigital number, since it uses as much as digits as its factorization.

194109761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 194109761 is about 13932.3279102955. The cubic root of 194109761 is about 579.0051922380.

The spelling of 194109761 in words is "one hundred ninety-four million, one hundred nine thousand, seven hundred sixty-one".