194908151 has 2 divisors, whose sum is σ = 194908152. Its totient is φ = 194908150.

The previous prime is 194908139. The next prime is 194908157. The reversal of 194908151 is 151809491.

It is a strong prime.

It is an emirp because it is prime and its reverse (151809491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194908151 - 2¹⁸ = 194646007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194908157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97454075 + 97454076.

It is an arithmetic number, because the mean of its divisors is an integer number (97454076).

Almost surely, 2^194908151 is an apocalyptic number.

194908151 is a deficient number, since it is larger than the sum of its proper divisors (1).

194908151 is an equidigital number, since it uses as much as digits as its factorization.

194908151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 194908151 is about 13960.9509346606. The cubic root of 194908151 is about 579.7979389282.

The spelling of 194908151 in words is "one hundred ninety-four million, nine hundred eight thousand, one hundred fifty-one".