145569089 has 4 divisors (see below), whose sum is σ = 153230640. Its totient is φ = 137907540.

The previous prime is 145569077. The next prime is 145569121. The reversal of 145569089 is 980965541.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145569089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145569049) 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, 3830747 + ... + 3830784.

It is an arithmetic number, because the mean of its divisors is an integer number (38307660).

Almost surely, 2^145569089 is an apocalyptic number.

145569089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

145569089 is a deficient number, since it is larger than the sum of its proper divisors (7661551).

145569089 is an equidigital number, since it uses as much as digits as its factorization.

145569089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7661550.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 145569089 is about 12065.2015731193. The cubic root of 145569089 is about 526.0451909782.

The spelling of 145569089 in words is "one hundred forty-five million, five hundred sixty-nine thousand, eighty-nine".