146839181 has 2 divisors, whose sum is σ = 146839182. Its totient is φ = 146839180.

The previous prime is 146839159. The next prime is 146839207. The reversal of 146839181 is 181938641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91202500 + 55636681 = 9550^2 + 7459^2 .

It is a cyclic number.

It is not a de Polignac number, because 146839181 - 2¹⁰ = 146838157 is a prime.

It is a super-2 number, since 2×146839181² = 43123490153501522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146830181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73419590 + 73419591.

It is an arithmetic number, because the mean of its divisors is an integer number (73419591).

Almost surely, 2^146839181 is an apocalyptic number.

It is an amenable number.

146839181 is a deficient number, since it is larger than the sum of its proper divisors (1).

146839181 is an equidigital number, since it uses as much as digits as its factorization.

146839181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The square root of 146839181 is about 12117.7217743271. The cubic root of 146839181 is about 527.5706797171.

The spelling of 146839181 in words is "one hundred forty-six million, eight hundred thirty-nine thousand, one hundred eighty-one".