149066861 has 2 divisors, whose sum is σ = 149066862. Its totient is φ = 149066860.

The previous prime is 149066851. The next prime is 149066891. The reversal of 149066861 is 168660941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143544361 + 5522500 = 11981^2 + 2350^2 .

It is an emirp because it is prime and its reverse (168660941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149066861 - 2¹⁰ = 149065837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149066851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74533430 + 74533431.

It is an arithmetic number, because the mean of its divisors is an integer number (74533431).

Almost surely, 2^149066861 is an apocalyptic number.

It is an amenable number.

149066861 is a deficient number, since it is larger than the sum of its proper divisors (1).

149066861 is an equidigital number, since it uses as much as digits as its factorization.

149066861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 149066861 is about 12209.2940418355. The cubic root of 149066861 is about 530.2252051121.

The spelling of 149066861 in words is "one hundred forty-nine million, sixty-six thousand, eight hundred sixty-one".