154549117 has 2 divisors, whose sum is σ = 154549118. Its totient is φ = 154549116.

The previous prime is 154549079. The next prime is 154549127. The reversal of 154549117 is 711945451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154405476 + 143641 = 12426^2 + 379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154549117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154549127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77274558 + 77274559.

It is an arithmetic number, because the mean of its divisors is an integer number (77274559).

Almost surely, 2^154549117 is an apocalyptic number.

It is an amenable number.

154549117 is a deficient number, since it is larger than the sum of its proper divisors (1).

154549117 is an equidigital number, since it uses as much as digits as its factorization.

154549117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 37.

The square root of 154549117 is about 12431.7785131493. The cubic root of 154549117 is about 536.6471690682.

The spelling of 154549117 in words is "one hundred fifty-four million, five hundred forty-nine thousand, one hundred seventeen".