154244861 has 2 divisors, whose sum is σ = 154244862. Its totient is φ = 154244860.

The previous prime is 154244851. The next prime is 154244947. The reversal of 154244861 is 168442451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139948900 + 14295961 = 11830^2 + 3781^2 .

It is an emirp because it is prime and its reverse (168442451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154244861 - 2²² = 150050557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154244851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77122430 + 77122431.

It is an arithmetic number, because the mean of its divisors is an integer number (77122431).

Almost surely, 2^154244861 is an apocalyptic number.

It is an amenable number.

154244861 is a deficient number, since it is larger than the sum of its proper divisors (1).

154244861 is an equidigital number, since it uses as much as digits as its factorization.

154244861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 35.

The square root of 154244861 is about 12419.5354583012. The cubic root of 154244861 is about 536.2947775687.

The spelling of 154244861 in words is "one hundred fifty-four million, two hundred forty-four thousand, eight hundred sixty-one".