149342009 has 2 divisors, whose sum is σ = 149342010. Its totient is φ = 149342008.

The previous prime is 149341987. The next prime is 149342023. The reversal of 149342009 is 900243941.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116532025 + 32809984 = 10795^2 + 5728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149342009 is a prime.

It is not a weakly prime, because it can be changed into another prime (149342029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74671004 + 74671005.

It is an arithmetic number, because the mean of its divisors is an integer number (74671005).

Almost surely, 2^149342009 is an apocalyptic number.

It is an amenable number.

149342009 is a deficient number, since it is larger than the sum of its proper divisors (1).

149342009 is an equidigital number, since it uses as much as digits as its factorization.

149342009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 149342009 is about 12220.5568203744. The cubic root of 149342009 is about 530.5512349533.

The spelling of 149342009 in words is "one hundred forty-nine million, three hundred forty-two thousand, nine".