194427151 has 2 divisors, whose sum is σ = 194427152. Its totient is φ = 194427150.

The previous prime is 194427061. The next prime is 194427157. The reversal of 194427151 is 151724491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194427151 - 2²³ = 186038543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194427157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97213575 + 97213576.

It is an arithmetic number, because the mean of its divisors is an integer number (97213576).

Almost surely, 2^194427151 is an apocalyptic number.

194427151 is a deficient number, since it is larger than the sum of its proper divisors (1).

194427151 is an equidigital number, since it uses as much as digits as its factorization.

194427151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 194427151 is about 13943.7136731934. The cubic root of 194427151 is about 579.3205986461.

The spelling of 194427151 in words is "one hundred ninety-four million, four hundred twenty-seven thousand, one hundred fifty-one".