386787649 has 2 divisors, whose sum is σ = 386787650. Its totient is φ = 386787648.

The previous prime is 386787647. The next prime is 386787659. The reversal of 386787649 is 946787683.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252969025 + 133818624 = 15905^2 + 11568^2 .

It is a cyclic number.

It is not a de Polignac number, because 386787649 - 2¹ = 386787647 is a prime.

Together with 386787647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 386787593 and 386787602.

It is not a weakly prime, because it can be changed into another prime (386787647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193393824 + 193393825.

It is an arithmetic number, because the mean of its divisors is an integer number (193393825).

Almost surely, 2^386787649 is an apocalyptic number.

It is an amenable number.

386787649 is a deficient number, since it is larger than the sum of its proper divisors (1).

386787649 is an equidigital number, since it uses as much as digits as its factorization.

386787649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 58.

The square root of 386787649 is about 19666.9176283423. The cubic root of 386787649 is about 728.6028503081.

The spelling of 386787649 in words is "three hundred eighty-six million, seven hundred eighty-seven thousand, six hundred forty-nine".