383400649 has 2 divisors, whose sum is σ = 383400650. Its totient is φ = 383400648.

The previous prime is 383400629. The next prime is 383400673. The reversal of 383400649 is 946004383.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237160000 + 146240649 = 15400^2 + 12093^2 .

It is a cyclic number.

It is not a de Polignac number, because 383400649 - 2⁵ = 383400617 is a prime.

It is not a weakly prime, because it can be changed into another prime (383400629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191700324 + 191700325.

It is an arithmetic number, because the mean of its divisors is an integer number (191700325).

Almost surely, 2^383400649 is an apocalyptic number.

It is an amenable number.

383400649 is a deficient number, since it is larger than the sum of its proper divisors (1).

383400649 is an equidigital number, since it uses as much as digits as its factorization.

383400649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 383400649 is about 19580.6192190135. The cubic root of 383400649 is about 726.4698829111.

The spelling of 383400649 in words is "three hundred eighty-three million, four hundred thousand, six hundred forty-nine".