147271681 has 2 divisors, whose sum is σ = 147271682. Its totient is φ = 147271680.

The previous prime is 147271667. The next prime is 147271687. The reversal of 147271681 is 186172741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147258225 + 13456 = 12135^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 147271681 - 2²¹ = 145174529 is a prime.

It is a super-2 number, since 2×147271681² = 43377896049131522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 147271681.

It is not a weakly prime, because it can be changed into another prime (147271687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73635840 + 73635841.

It is an arithmetic number, because the mean of its divisors is an integer number (73635841).

Almost surely, 2^147271681 is an apocalyptic number.

It is an amenable number.

147271681 is a deficient number, since it is larger than the sum of its proper divisors (1).

147271681 is an equidigital number, since it uses as much as digits as its factorization.

147271681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 37.

The square root of 147271681 is about 12135.5544166717. The cubic root of 147271681 is about 528.0881407512.

It can be divided in two parts, 1472 and 71681, that added together give a triangular number (73153 = T₃₈₂).

The spelling of 147271681 in words is "one hundred forty-seven million, two hundred seventy-one thousand, six hundred eighty-one".