149636009 has 2 divisors, whose sum is σ = 149636010. Its totient is φ = 149636008.

The previous prime is 149635951. The next prime is 149636021. The reversal of 149636009 is 900636941.

149636009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80496784 + 69139225 = 8972^2 + 8315^2 .

It is an emirp because it is prime and its reverse (900636941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149636009 - 2⁸ = 149635753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149636059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74818004 + 74818005.

It is an arithmetic number, because the mean of its divisors is an integer number (74818005).

Almost surely, 2^149636009 is an apocalyptic number.

It is an amenable number.

149636009 is a deficient number, since it is larger than the sum of its proper divisors (1).

149636009 is an equidigital number, since it uses as much as digits as its factorization.

149636009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 149636009 is about 12232.5798178471. The cubic root of 149636009 is about 530.8991607616.

The spelling of 149636009 in words is "one hundred forty-nine million, six hundred thirty-six thousand, nine".