194349877 has 2 divisors, whose sum is σ = 194349878. Its totient is φ = 194349876.

The previous prime is 194349853. The next prime is 194349889. The reversal of 194349877 is 778943491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189723076 + 4626801 = 13774^2 + 2151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194349877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194349817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97174938 + 97174939.

It is an arithmetic number, because the mean of its divisors is an integer number (97174939).

Almost surely, 2^194349877 is an apocalyptic number.

It is an amenable number.

194349877 is a deficient number, since it is larger than the sum of its proper divisors (1).

194349877 is an equidigital number, since it uses as much as digits as its factorization.

194349877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 52.

The square root of 194349877 is about 13940.9424717269. The cubic root of 194349877 is about 579.2438392159.

The spelling of 194349877 in words is "one hundred ninety-four million, three hundred forty-nine thousand, eight hundred seventy-seven".