154976489 has 2 divisors, whose sum is σ = 154976490. Its totient is φ = 154976488.

The previous prime is 154976477. The next prime is 154976509. The reversal of 154976489 is 984679451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101203600 + 53772889 = 10060^2 + 7333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154976489 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 154976489.

It is not a weakly prime, because it can be changed into another prime (154976089) 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 as a sum of consecutive naturals, namely, 77488244 + 77488245.

It is an arithmetic number, because the mean of its divisors is an integer number (77488245).

Almost surely, 2^154976489 is an apocalyptic number.

It is an amenable number.

154976489 is a deficient number, since it is larger than the sum of its proper divisors (1).

154976489 is an equidigital number, since it uses as much as digits as its factorization.

154976489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The square root of 154976489 is about 12448.9553376980. The cubic root of 154976489 is about 537.1413741869.

The spelling of 154976489 in words is "one hundred fifty-four million, nine hundred seventy-six thousand, four hundred eighty-nine".