194950993 has 2 divisors, whose sum is σ = 194950994. Its totient is φ = 194950992.

The previous prime is 194950991. The next prime is 194950997. The reversal of 194950993 is 399059491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129777664 + 65173329 = 11392^2 + 8073^2 .

It is a cyclic number.

It is not a de Polignac number, because 194950993 - 2¹ = 194950991 is a prime.

Together with 194950991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (194950991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97475496 + 97475497.

It is an arithmetic number, because the mean of its divisors is an integer number (97475497).

Almost surely, 2^194950993 is an apocalyptic number.

It is an amenable number.

194950993 is a deficient number, since it is larger than the sum of its proper divisors (1).

194950993 is an equidigital number, since it uses as much as digits as its factorization.

194950993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 194950993 is about 13962.4852014246. The cubic root of 194950993 is about 579.8404168568.

The spelling of 194950993 in words is "one hundred ninety-four million, nine hundred fifty thousand, nine hundred ninety-three".