149905549 has 2 divisors, whose sum is σ = 149905550. Its totient is φ = 149905548.

The previous prime is 149905543. The next prime is 149905589. The reversal of 149905549 is 945509941.

It is a happy number.

149905549 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., 118657449 + 31248100 = 10893^2 + 5590^2 .

It is a cyclic number.

It is not a de Polignac number, because 149905549 - 2⁹ = 149905037 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 149905499 and 149905508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149905543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74952774 + 74952775.

It is an arithmetic number, because the mean of its divisors is an integer number (74952775).

Almost surely, 2^149905549 is an apocalyptic number.

It is an amenable number.

149905549 is a deficient number, since it is larger than the sum of its proper divisors (1).

149905549 is an equidigital number, since it uses as much as digits as its factorization.

149905549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 149905549 is about 12243.5921607999. The cubic root of 149905549 is about 531.2177398819.

The spelling of 149905549 in words is "one hundred forty-nine million, nine hundred five thousand, five hundred forty-nine".