149454709 has 2 divisors, whose sum is σ = 149454710. Its totient is φ = 149454708.

The previous prime is 149454707. The next prime is 149454727. The reversal of 149454709 is 907454941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141491025 + 7963684 = 11895^2 + 2822^2 .

It is an emirp because it is prime and its reverse (907454941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149454709 - 2¹ = 149454707 is a prime.

Together with 149454707, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149454707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74727354 + 74727355.

It is an arithmetic number, because the mean of its divisors is an integer number (74727355).

Almost surely, 2^149454709 is an apocalyptic number.

It is an amenable number.

149454709 is a deficient number, since it is larger than the sum of its proper divisors (1).

149454709 is an equidigital number, since it uses as much as digits as its factorization.

149454709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 149454709 is about 12225.1670336237. The cubic root of 149454709 is about 530.6846604376.

The spelling of 149454709 in words is "one hundred forty-nine million, four hundred fifty-four thousand, seven hundred nine".