149974439 has 2 divisors, whose sum is σ = 149974440. Its totient is φ = 149974438.

The previous prime is 149974423. The next prime is 149974453. The reversal of 149974439 is 934479941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149974439 - 2⁴ = 149974423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149974499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74987219 + 74987220.

It is an arithmetic number, because the mean of its divisors is an integer number (74987220).

Almost surely, 2^149974439 is an apocalyptic number.

149974439 is a deficient number, since it is larger than the sum of its proper divisors (1).

149974439 is an equidigital number, since it uses as much as digits as its factorization.

149974439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 149974439 is about 12246.4051460010. The cubic root of 149974439 is about 531.2991021927.

The spelling of 149974439 in words is "one hundred forty-nine million, nine hundred seventy-four thousand, four hundred thirty-nine".