194239937 has 2 divisors, whose sum is σ = 194239938. Its totient is φ = 194239936.

The previous prime is 194239931. The next prime is 194239939. The reversal of 194239937 is 739932491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163226176 + 31013761 = 12776^2 + 5569^2 .

It is a cyclic number.

It is not a de Polignac number, because 194239937 - 2⁶ = 194239873 is a prime.

Together with 194239939, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 194239891 and 194239900.

It is not a weakly prime, because it can be changed into another prime (194239931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97119968 + 97119969.

It is an arithmetic number, because the mean of its divisors is an integer number (97119969).

Almost surely, 2^194239937 is an apocalyptic number.

It is an amenable number.

194239937 is a deficient number, since it is larger than the sum of its proper divisors (1).

194239937 is an equidigital number, since it uses as much as digits as its factorization.

194239937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 47.

The square root of 194239937 is about 13936.9988519767. The cubic root of 194239937 is about 579.1345962356.

The spelling of 194239937 in words is "one hundred ninety-four million, two hundred thirty-nine thousand, nine hundred thirty-seven".