145624189 has 16 divisors (see below), whose sum is σ = 157351680. Its totient is φ = 134334720.

The previous prime is 145624183. The next prime is 145624207. The reversal of 145624189 is 981426541.

145624189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 145624189 - 2¹⁹ = 145099901 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 (145624183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279249 + ... + 279769.

It is an arithmetic number, because the mean of its divisors is an integer number (9834480).

Almost surely, 2^145624189 is an apocalyptic number.

145624189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

145624189 is a deficient number, since it is larger than the sum of its proper divisors (11727491).

145624189 is a wasteful number, since it uses less digits than its factorization.

145624189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900.

The product of its digits is 69120, while the sum is 40.

The square root of 145624189 is about 12067.4847834998. The cubic root of 145624189 is about 526.1115545034. Note that the first 3 decimals are identical.

The spelling of 145624189 in words is "one hundred forty-five million, six hundred twenty-four thousand, one hundred eighty-nine".