149378833 has 4 divisors (see below), whose sum is σ = 149537520. Its totient is φ = 149220148.

The previous prime is 149378807. The next prime is 149378837. The reversal of 149378833 is 338873941.

It is a happy number.

149378833 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 338873941 = 7 ⋅48410563.

It is a cyclic number.

It is not a de Polignac number, because 149378833 - 2²¹ = 147281681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149378837) 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, 77923 + ... + 79816.

It is an arithmetic number, because the mean of its divisors is an integer number (37384380).

Almost surely, 2^149378833 is an apocalyptic number.

It is an amenable number.

149378833 is a deficient number, since it is larger than the sum of its proper divisors (158687).

149378833 is an equidigital number, since it uses as much as digits as its factorization.

149378833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158686.

The product of its digits is 435456, while the sum is 46.

The square root of 149378833 is about 12222.0633691697. The cubic root of 149378833 is about 530.5948382530.

The spelling of 149378833 in words is "one hundred forty-nine million, three hundred seventy-eight thousand, eight hundred thirty-three".