189420151 has 2 divisors, whose sum is σ = 189420152. Its totient is φ = 189420150.

The previous prime is 189420097. The next prime is 189420163. The reversal of 189420151 is 151024981.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (151024981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189420151 - 2²⁷ = 55202423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189429151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94710075 + 94710076.

It is an arithmetic number, because the mean of its divisors is an integer number (94710076).

Almost surely, 2^189420151 is an apocalyptic number.

189420151 is a deficient number, since it is larger than the sum of its proper divisors (1).

189420151 is an equidigital number, since it uses as much as digits as its factorization.

189420151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 189420151 is about 13762.9993460728. Note that the first 3 decimals coincide. The cubic root of 189420151 is about 574.3042887585.

The spelling of 189420151 in words is "one hundred eighty-nine million, four hundred twenty thousand, one hundred fifty-one".