384317661 has 24 divisors (see below), whose sum is σ = 634146240. Its totient is φ = 202715136.

The previous prime is 384317611. The next prime is 384317663. The reversal of 384317661 is 166713483.

It is not a de Polignac number, because 384317661 - 2¹³ = 384309469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384317663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50596 + ... + 57693.

It is an arithmetic number, because the mean of its divisors is an integer number (26422760).

Almost surely, 2^384317661 is an apocalyptic number.

It is an amenable number.

384317661 is a deficient number, since it is larger than the sum of its proper divisors (249828579).

384317661 is a wasteful number, since it uses less digits than its factorization.

384317661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108325 (or 108312 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 384317661 is about 19604.0215517123. The cubic root of 384317661 is about 727.0486083997.

The spelling of 384317661 in words is "three hundred eighty-four million, three hundred seventeen thousand, six hundred sixty-one".