154885729 has 2 divisors, whose sum is σ = 154885730. Its totient is φ = 154885728.

The previous prime is 154885711. The next prime is 154885733. The reversal of 154885729 is 927588451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150111504 + 4774225 = 12252^2 + 2185^2 .

It is an emirp because it is prime and its reverse (927588451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154885729 - 2¹¹ = 154883681 is a prime.

It is a super-2 number, since 2×154885729² = 47979178095722882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154885789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77442864 + 77442865.

It is an arithmetic number, because the mean of its divisors is an integer number (77442865).

Almost surely, 2^154885729 is an apocalyptic number.

It is an amenable number.

154885729 is a deficient number, since it is larger than the sum of its proper divisors (1).

154885729 is an equidigital number, since it uses as much as digits as its factorization.

154885729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 49.

The square root of 154885729 is about 12445.3095180474. The cubic root of 154885729 is about 537.0364970507.

The spelling of 154885729 in words is "one hundred fifty-four million, eight hundred eighty-five thousand, seven hundred twenty-nine".