149083819 has 4 divisors (see below), whose sum is σ = 149477560. Its totient is φ = 148690080.

The previous prime is 149083813. The next prime is 149083843. The reversal of 149083819 is 918380941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918380941 = 19 ⋅48335839.

It is a cyclic number.

It is not a de Polignac number, because 149083819 - 2⁷ = 149083691 is a prime.

It is a super-2 number, since 2×149083819² = 44451970175249522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149083813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196302 + ... + 197059.

It is an arithmetic number, because the mean of its divisors is an integer number (37369390).

Almost surely, 2^149083819 is an apocalyptic number.

149083819 is a deficient number, since it is larger than the sum of its proper divisors (393741).

149083819 is an equidigital number, since it uses as much as digits as its factorization.

149083819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393740.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 149083819 is about 12209.9884930331. The cubic root of 149083819 is about 530.2453106720.

The spelling of 149083819 in words is "one hundred forty-nine million, eighty-three thousand, eight hundred nineteen".