149405543 has 4 divisors (see below), whose sum is σ = 170749200. Its totient is φ = 128061888.

The previous prime is 149405497. The next prime is 149405573. The reversal of 149405543 is 345504941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149405543 - 2⁶ = 149405479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149405573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10671818 + ... + 10671831.

It is an arithmetic number, because the mean of its divisors is an integer number (42687300).

Almost surely, 2^149405543 is an apocalyptic number.

149405543 is a deficient number, since it is larger than the sum of its proper divisors (21343657).

149405543 is an equidigital number, since it uses as much as digits as its factorization.

149405543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21343656.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 149405543 is about 12223.1560163486. The cubic root of 149405543 is about 530.6264610812.

The spelling of 149405543 in words is "one hundred forty-nine million, four hundred five thousand, five hundred forty-three".