194473439 has 2 divisors, whose sum is σ = 194473440. Its totient is φ = 194473438.

The previous prime is 194473361. The next prime is 194473469. The reversal of 194473439 is 934374491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194473439 - 2¹² = 194469343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194473439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194473469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97236719 + 97236720.

It is an arithmetic number, because the mean of its divisors is an integer number (97236720).

Almost surely, 2^194473439 is an apocalyptic number.

194473439 is a deficient number, since it is larger than the sum of its proper divisors (1).

194473439 is an equidigital number, since it uses as much as digits as its factorization.

194473439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 44.

The square root of 194473439 is about 13945.3733904833. The cubic root of 194473439 is about 579.3665686730.

The spelling of 194473439 in words is "one hundred ninety-four million, four hundred seventy-three thousand, four hundred thirty-nine".