144195091 has 2 divisors, whose sum is σ = 144195092. Its totient is φ = 144195090.

The previous prime is 144195089. The next prime is 144195127. The reversal of 144195091 is 190591441.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 144195091 - 2¹ = 144195089 is a prime.

Together with 144195089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (144195691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72097545 + 72097546.

It is an arithmetic number, because the mean of its divisors is an integer number (72097546).

Almost surely, 2^144195091 is an apocalyptic number.

144195091 is a deficient number, since it is larger than the sum of its proper divisors (1).

144195091 is an equidigital number, since it uses as much as digits as its factorization.

144195091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 144195091 is about 12008.1260403112. The cubic root of 144195091 is about 524.3848771463.

The spelling of 144195091 in words is "one hundred forty-four million, one hundred ninety-five thousand, ninety-one".