386947481 has 2 divisors, whose sum is σ = 386947482. Its totient is φ = 386947480.

The previous prime is 386947471. The next prime is 386947501. The reversal of 386947481 is 184749683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272778256 + 114169225 = 16516^2 + 10685^2 .

It is a cyclic number.

It is not a de Polignac number, because 386947481 - 2¹⁸ = 386685337 is a prime.

It is a super-2 number, since 2×386947481² = 299456706104490722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (386947471) 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, 193473740 + 193473741.

It is an arithmetic number, because the mean of its divisors is an integer number (193473741).

Almost surely, 2^386947481 is an apocalyptic number.

It is an amenable number.

386947481 is a deficient number, since it is larger than the sum of its proper divisors (1).

386947481 is an equidigital number, since it uses as much as digits as its factorization.

386947481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 50.

The square root of 386947481 is about 19670.9806822131. The cubic root of 386947481 is about 728.7031965093.

The spelling of 386947481 in words is "three hundred eighty-six million, nine hundred forty-seven thousand, four hundred eighty-one".