149283581 has 2 divisors, whose sum is σ = 149283582. Its totient is φ = 149283580.

The previous prime is 149283529. The next prime is 149283623. The reversal of 149283581 is 185382941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112572100 + 36711481 = 10610^2 + 6059^2 .

It is a cyclic number.

It is not a de Polignac number, because 149283581 - 2⁶ = 149283517 is a prime.

It is a super-2 number, since 2×149283581² = 44571175112367122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149283521) 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, 74641790 + 74641791.

It is an arithmetic number, because the mean of its divisors is an integer number (74641791).

Almost surely, 2^149283581 is an apocalyptic number.

It is an amenable number.

149283581 is a deficient number, since it is larger than the sum of its proper divisors (1).

149283581 is an equidigital number, since it uses as much as digits as its factorization.

149283581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 41.

The square root of 149283581 is about 12218.1660244081. The cubic root of 149283581 is about 530.4820356452.

The spelling of 149283581 in words is "one hundred forty-nine million, two hundred eighty-three thousand, five hundred eighty-one".