149827081 has 2 divisors, whose sum is σ = 149827082. Its totient is φ = 149827080.

The previous prime is 149827033. The next prime is 149827121. The reversal of 149827081 is 180728941.

It is a happy number.

It is an a-pointer prime, because the next prime (149827121) can be obtained adding 149827081 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109935225 + 39891856 = 10485^2 + 6316^2 .

It is an emirp because it is prime and its reverse (180728941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149827081 - 2⁷ = 149826953 is a prime.

It is a super-2 number, since 2×149827081² = 44896308401961122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (149821081) 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, 74913540 + 74913541.

It is an arithmetic number, because the mean of its divisors is an integer number (74913541).

Almost surely, 2^149827081 is an apocalyptic number.

It is an amenable number.

149827081 is a deficient number, since it is larger than the sum of its proper divisors (1).

149827081 is an equidigital number, since it uses as much as digits as its factorization.

149827081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 149827081 is about 12240.3872896245. The cubic root of 149827081 is about 531.1250351330.

The spelling of 149827081 in words is "one hundred forty-nine million, eight hundred twenty-seven thousand, eighty-one".