149043619 has 4 divisors (see below), whose sum is σ = 156888040. Its totient is φ = 141199200.

The previous prime is 149043613. The next prime is 149043623. The reversal of 149043619 is 916340941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 916340941 = 127 ⋅7215283.

It is a cyclic number.

It is not a de Polignac number, because 149043619 - 2⁷ = 149043491 is a prime.

It is a super-2 number, since 2×149043619² = 44428000729234322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149043613) 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 in 3 ways as a sum of consecutive naturals, for example, 3922182 + ... + 3922219.

It is an arithmetic number, because the mean of its divisors is an integer number (39222010).

Almost surely, 2^149043619 is an apocalyptic number.

149043619 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

149043619 is a deficient number, since it is larger than the sum of its proper divisors (7844421).

149043619 is an equidigital number, since it uses as much as digits as its factorization.

149043619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7844420.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 149043619 is about 12208.3421888478. The cubic root of 149043619 is about 530.1976467072.

The spelling of 149043619 in words is "one hundred forty-nine million, forty-three thousand, six hundred nineteen".