383671649 has 2 divisors, whose sum is σ = 383671650. Its totient is φ = 383671648.

The previous prime is 383671591. The next prime is 383671661. The reversal of 383671649 is 946176383.

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., 364810000 + 18861649 = 19100^2 + 4343^2 .

It is a cyclic number.

It is not a de Polignac number, because 383671649 - 2¹² = 383667553 is a prime.

It is not a weakly prime, because it can be changed into another prime (383671049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191835824 + 191835825.

It is an arithmetic number, because the mean of its divisors is an integer number (191835825).

Almost surely, 2^383671649 is an apocalyptic number.

It is an amenable number.

383671649 is a deficient number, since it is larger than the sum of its proper divisors (1).

383671649 is an equidigital number, since it uses as much as digits as its factorization.

383671649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 47.

The square root of 383671649 is about 19587.5381046215. The cubic root of 383671649 is about 726.6410067485.

The spelling of 383671649 in words is "three hundred eighty-three million, six hundred seventy-one thousand, six hundred forty-nine".