145089013 has 4 divisors (see below), whose sum is σ = 145696320. Its totient is φ = 144481708.

The previous prime is 145088981. The next prime is 145089017. The reversal of 145089013 is 310980541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310980541 = 17 ⋅18292973.

It is a cyclic number.

It is not a de Polignac number, because 145089013 - 2⁵ = 145088981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145089017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303295 + ... + 303772.

It is an arithmetic number, because the mean of its divisors is an integer number (36424080).

Almost surely, 2^145089013 is an apocalyptic number.

It is an amenable number.

145089013 is a deficient number, since it is larger than the sum of its proper divisors (607307).

145089013 is an equidigital number, since it uses as much as digits as its factorization.

145089013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607306.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 145089013 is about 12045.2900753780. The cubic root of 145089013 is about 525.4662681593.

The spelling of 145089013 in words is "one hundred forty-five million, eighty-nine thousand, thirteen".