145273689 has 48 divisors (see below), whose sum is σ = 241315200. Its totient is φ = 86280480.

The previous prime is 145273679. The next prime is 145273691. The reversal of 145273689 is 986372541.

145273689 is a `hidden beast` number, since 14 + 527 + 36 + 89 = 666.

It is not a de Polignac number, because 145273689 - 2¹¹ = 145271641 is a prime.

It is a super-2 number, since 2×145273689² = 42208889431337442, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145273679) 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 in 47 ways as a sum of consecutive naturals, for example, 172732 + ... + 173570.

It is an arithmetic number, because the mean of its divisors is an integer number (5027400).

Almost surely, 2^145273689 is an apocalyptic number.

It is an amenable number.

145273689 is a deficient number, since it is larger than the sum of its proper divisors (96041511).

145273689 is a wasteful number, since it uses less digits than its factorization.

145273689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 906 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 145273689 is about 12052.9535384486. The cubic root of 145273689 is about 525.6891195497.

The spelling of 145273689 in words is "one hundred forty-five million, two hundred seventy-three thousand, six hundred eighty-nine".