386404661 has 2 divisors, whose sum is σ = 386404662. Its totient is φ = 386404660.

The previous prime is 386404657. The next prime is 386404687. The reversal of 386404661 is 166404683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369024100 + 17380561 = 19210^2 + 4169^2 .

It is a cyclic number.

It is not a de Polignac number, because 386404661 - 2² = 386404657 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386400661) 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, 193202330 + 193202331.

It is an arithmetic number, because the mean of its divisors is an integer number (193202331).

Almost surely, 2^386404661 is an apocalyptic number.

It is an amenable number.

386404661 is a deficient number, since it is larger than the sum of its proper divisors (1).

386404661 is an equidigital number, since it uses as much as digits as its factorization.

386404661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 386404661 is about 19657.1783580452. The cubic root of 386404661 is about 728.3622891100.

The spelling of 386404661 in words is "three hundred eighty-six million, four hundred four thousand, six hundred sixty-one".