386641961 has 2 divisors, whose sum is σ = 386641962. Its totient is φ = 386641960.

The previous prime is 386641877. The next prime is 386641967. The reversal of 386641961 is 169146683.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318265600 + 68376361 = 17840^2 + 8269^2 .

It is a cyclic number.

It is not a de Polignac number, because 386641961 - 2¹⁸ = 386379817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (386641967) 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, 193320980 + 193320981.

It is an arithmetic number, because the mean of its divisors is an integer number (193320981).

Almost surely, 2^386641961 is an apocalyptic number.

It is an amenable number.

386641961 is a deficient number, since it is larger than the sum of its proper divisors (1).

386641961 is an equidigital number, since it uses as much as digits as its factorization.

386641961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 44.

The square root of 386641961 is about 19663.2133945599. The cubic root of 386641961 is about 728.5113599494.

The spelling of 386641961 in words is "three hundred eighty-six million, six hundred forty-one thousand, nine hundred sixty-one".