149216549 has 2 divisors, whose sum is σ = 149216550. Its totient is φ = 149216548.

The previous prime is 149216533. The next prime is 149216569. The reversal of 149216549 is 945612941.

149216549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130119649 + 19096900 = 11407^2 + 4370^2 .

It is a cyclic number.

It is not a de Polignac number, because 149216549 - 2⁴ = 149216533 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149216569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74608274 + 74608275.

It is an arithmetic number, because the mean of its divisors is an integer number (74608275).

Almost surely, 2^149216549 is an apocalyptic number.

It is an amenable number.

149216549 is a deficient number, since it is larger than the sum of its proper divisors (1).

149216549 is an equidigital number, since it uses as much as digits as its factorization.

149216549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 149216549 is about 12215.4225878600. The cubic root of 149216549 is about 530.4026239304.

The spelling of 149216549 in words is "one hundred forty-nine million, two hundred sixteen thousand, five hundred forty-nine".