145887019 has 2 divisors, whose sum is σ = 145887020. Its totient is φ = 145887018.

The previous prime is 145887011. The next prime is 145887031. The reversal of 145887019 is 910788541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145887019 - 2³ = 145887011 is a prime.

It is a super-5 number, since 5×145887019⁵ (a number of 42 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (145887011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72943509 + 72943510.

It is an arithmetic number, because the mean of its divisors is an integer number (72943510).

Almost surely, 2^145887019 is an apocalyptic number.

145887019 is a deficient number, since it is larger than the sum of its proper divisors (1).

145887019 is an equidigital number, since it uses as much as digits as its factorization.

145887019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 145887019 is about 12078.3698817349. The cubic root of 145887019 is about 526.4278819711.

The spelling of 145887019 in words is "one hundred forty-five million, eight hundred eighty-seven thousand, nineteen".