154765489 has 4 divisors (see below), whose sum is σ = 160102260. Its totient is φ = 149428720.

The previous prime is 154765477. The next prime is 154765517. The reversal of 154765489 is 984567451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984567451 = 7 ⋅140652493.

It can be written as a sum of positive squares in 2 ways, for example, as 125821089 + 28944400 = 11217^2 + 5380^2 .

It is a cyclic number.

It is not a de Polignac number, because 154765489 - 2⁹ = 154764977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154765189) 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, 2668342 + ... + 2668399.

It is an arithmetic number, because the mean of its divisors is an integer number (40025565).

Almost surely, 2^154765489 is an apocalyptic number.

It is an amenable number.

154765489 is a deficient number, since it is larger than the sum of its proper divisors (5336771).

154765489 is an equidigital number, since it uses as much as digits as its factorization.

154765489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5336770.

The product of its digits is 1209600, while the sum is 49.

The square root of 154765489 is about 12440.4778445203. The cubic root of 154765489 is about 536.8974913770.

The spelling of 154765489 in words is "one hundred fifty-four million, seven hundred sixty-five thousand, four hundred eighty-nine".