147811 has 2 divisors, whose sum is σ = 147812. Its totient is φ = 147810.

The previous prime is 147799. The next prime is 147827. The reversal of 147811 is 118741.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 147811 - 2⁵ = 147779 is a prime.

147811 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (147881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73905 + 73906.

It is an arithmetic number, because the mean of its divisors is an integer number (73906).

2¹⁴⁷⁸¹¹ is an apocalyptic number.

147811 is a deficient number, since it is larger than the sum of its proper divisors (1).

147811 is an equidigital number, since it uses as much as digits as its factorization.

147811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224, while the sum is 22.

The square root of 147811 is about 384.4619617075. The cubic root of 147811 is about 52.8731987121.

The spelling of 147811 in words is "one hundred forty-seven thousand, eight hundred eleven".