149665387 has 2 divisors, whose sum is σ = 149665388. Its totient is φ = 149665386.

The previous prime is 149665379. The next prime is 149665409. The reversal of 149665387 is 783566941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149665387 - 2³ = 149665379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149665387.

It is not a weakly prime, because it can be changed into another prime (149665357) 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, 74832693 + 74832694.

It is an arithmetic number, because the mean of its divisors is an integer number (74832694).

Almost surely, 2^149665387 is an apocalyptic number.

149665387 is a deficient number, since it is larger than the sum of its proper divisors (1).

149665387 is an equidigital number, since it uses as much as digits as its factorization.

149665387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 149665387 is about 12233.7805685732. The cubic root of 149665387 is about 530.9339022543.

The spelling of 149665387 in words is "one hundred forty-nine million, six hundred sixty-five thousand, three hundred eighty-seven".