149904239 has 2 divisors, whose sum is σ = 149904240. Its totient is φ = 149904238.

The previous prime is 149904229. The next prime is 149904247. The reversal of 149904239 is 932409941.

It is a strong prime.

It is an emirp because it is prime and its reverse (932409941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149904239 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 149904196 and 149904205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149904229) 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 as a sum of consecutive naturals, namely, 74952119 + 74952120.

It is an arithmetic number, because the mean of its divisors is an integer number (74952120).

Almost surely, 2^149904239 is an apocalyptic number.

149904239 is a deficient number, since it is larger than the sum of its proper divisors (1).

149904239 is an equidigital number, since it uses as much as digits as its factorization.

149904239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 149904239 is about 12243.5386633114. The cubic root of 149904239 is about 531.2161924691.

The spelling of 149904239 in words is "one hundred forty-nine million, nine hundred four thousand, two hundred thirty-nine".