149966771 has 2 divisors, whose sum is σ = 149966772. Its totient is φ = 149966770.

The previous prime is 149966717. The next prime is 149966777. The reversal of 149966771 is 177669941.

Together with previous prime (149966717) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149966771 is a prime.

It is not a weakly prime, because it can be changed into another prime (149966777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74983385 + 74983386.

It is an arithmetic number, because the mean of its divisors is an integer number (74983386).

Almost surely, 2^149966771 is an apocalyptic number.

149966771 is a deficient number, since it is larger than the sum of its proper divisors (1).

149966771 is an equidigital number, since it uses as much as digits as its factorization.

149966771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 50.

The square root of 149966771 is about 12246.0920705342. The cubic root of 149966771 is about 531.2900471587.

The spelling of 149966771 in words is "one hundred forty-nine million, nine hundred sixty-six thousand, seven hundred seventy-one".