145191911 has 2 divisors, whose sum is σ = 145191912. Its totient is φ = 145191910.

The previous prime is 145191887. The next prime is 145191913. The reversal of 145191911 is 119191541.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145191911 - 2²² = 140997607 is a prime.

Together with 145191913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145191913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72595955 + 72595956.

It is an arithmetic number, because the mean of its divisors is an integer number (72595956).

Almost surely, 2^145191911 is an apocalyptic number.

145191911 is a deficient number, since it is larger than the sum of its proper divisors (1).

145191911 is an equidigital number, since it uses as much as digits as its factorization.

145191911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 32.

The square root of 145191911 is about 12049.5606143959. The cubic root of 145191911 is about 525.5904600831.

The spelling of 145191911 in words is "one hundred forty-five million, one hundred ninety-one thousand, nine hundred eleven".