194253937 has 2 divisors, whose sum is σ = 194253938. Its totient is φ = 194253936.

The previous prime is 194253907. The next prime is 194253989. The reversal of 194253937 is 739352491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191434896 + 2819041 = 13836^2 + 1679^2 .

It is a cyclic number.

It is not a de Polignac number, because 194253937 - 2⁷ = 194253809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 194253893 and 194253902.

It is not a weakly prime, because it can be changed into another prime (194253907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97126968 + 97126969.

It is an arithmetic number, because the mean of its divisors is an integer number (97126969).

Almost surely, 2^194253937 is an apocalyptic number.

It is an amenable number.

194253937 is a deficient number, since it is larger than the sum of its proper divisors (1).

194253937 is an equidigital number, since it uses as much as digits as its factorization.

194253937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 194253937 is about 13937.5011031390. The cubic root of 194253937 is about 579.1485097655.

The spelling of 194253937 in words is "one hundred ninety-four million, two hundred fifty-three thousand, nine hundred thirty-seven".