154446949 has 2 divisors, whose sum is σ = 154446950. Its totient is φ = 154446948.

The previous prime is 154446947. The next prime is 154446979. The reversal of 154446949 is 949644451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121154049 + 33292900 = 11007^2 + 5770^2 .

It is a cyclic number.

It is not a de Polignac number, because 154446949 - 2¹ = 154446947 is a prime.

Together with 154446947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 154446899 and 154446908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154446947) 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, 77223474 + 77223475.

It is an arithmetic number, because the mean of its divisors is an integer number (77223475).

Almost surely, 2^154446949 is an apocalyptic number.

It is an amenable number.

154446949 is a deficient number, since it is larger than the sum of its proper divisors (1).

154446949 is an equidigital number, since it uses as much as digits as its factorization.

154446949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 46.

The square root of 154446949 is about 12427.6686872478. The cubic root of 154446949 is about 536.5288889700.

The spelling of 154446949 in words is "one hundred fifty-four million, four hundred forty-six thousand, nine hundred forty-nine".