145490089 has 2 divisors, whose sum is σ = 145490090. Its totient is φ = 145490088.

The previous prime is 145489999. The next prime is 145490117. The reversal of 145490089 is 980094541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123587689 + 21902400 = 11117^2 + 4680^2 .

It is an emirp because it is prime and its reverse (980094541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145490089 - 2¹⁷ = 145359017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145490489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72745044 + 72745045.

It is an arithmetic number, because the mean of its divisors is an integer number (72745045).

Almost surely, 2^145490089 is an apocalyptic number.

It is an amenable number.

145490089 is a deficient number, since it is larger than the sum of its proper divisors (1).

145490089 is an equidigital number, since it uses as much as digits as its factorization.

145490089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 145490089 is about 12061.9272506511. The cubic root of 145490089 is about 525.9500125985.

The spelling of 145490089 in words is "one hundred forty-five million, four hundred ninety thousand, eighty-nine".