149401709 has 2 divisors, whose sum is σ = 149401710. Its totient is φ = 149401708.

The previous prime is 149401691. The next prime is 149401711. The reversal of 149401709 is 907104941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143472484 + 5929225 = 11978^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 149401709 - 2⁸ = 149401453 is a prime.

Together with 149401711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149401739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74700854 + 74700855.

It is an arithmetic number, because the mean of its divisors is an integer number (74700855).

Almost surely, 2^149401709 is an apocalyptic number.

It is an amenable number.

149401709 is a deficient number, since it is larger than the sum of its proper divisors (1).

149401709 is an equidigital number, since it uses as much as digits as its factorization.

149401709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 149401709 is about 12222.9991818702. Note that the first 3 decimals coincide. The cubic root of 149401709 is about 530.6219221169.

The spelling of 149401709 in words is "one hundred forty-nine million, four hundred one thousand, seven hundred nine".