386646641 has 2 divisors, whose sum is σ = 386646642. Its totient is φ = 386646640.

The previous prime is 386646613. The next prime is 386646649. The reversal of 386646641 is 146646683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335952241 + 50694400 = 18329^2 + 7120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-386646641 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 386646592 and 386646601.

It is not a weakly prime, because it can be changed into another prime (386646649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193323320 + 193323321.

It is an arithmetic number, because the mean of its divisors is an integer number (193323321).

Almost surely, 2^386646641 is an apocalyptic number.

It is an amenable number.

386646641 is a deficient number, since it is larger than the sum of its proper divisors (1).

386646641 is an equidigital number, since it uses as much as digits as its factorization.

386646641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 44.

The square root of 386646641 is about 19663.3323981466. The cubic root of 386646641 is about 728.5142992919.

The spelling of 386646641 in words is "three hundred eighty-six million, six hundred forty-six thousand, six hundred forty-one".