384913531397 has 16 divisors (see below), whose sum is σ = 401808446640. Its totient is φ = 368275095552.

The previous prime is 384913531391. The next prime is 384913531403. The reversal of 384913531397 is 793135319483.

It is a Cunningham number, because it is equal to 620414²+1.

It is an interprime number because it is at equal distance from previous prime (384913531391) and next prime (384913531403).

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 384913531396 = 1^2 + 620414^2 .

It is a cyclic number.

It is not a de Polignac number, because 384913531397 - 2⁶ = 384913531333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384913531391) 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 in 15 ways as a sum of consecutive naturals, for example, 1304633 + ... + 1572225.

It is an arithmetic number, because the mean of its divisors is an integer number (25113027915).

Almost surely, 2^384913531397 is an apocalyptic number.

It is an amenable number.

384913531397 is a deficient number, since it is larger than the sum of its proper divisors (16894915243).

384913531397 is a wasteful number, since it uses less digits than its factorization.

384913531397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268072.

The product of its digits is 7348320, while the sum is 56.

The spelling of 384913531397 in words is "three hundred eighty-four billion, nine hundred thirteen million, five hundred thirty-one thousand, three hundred ninety-seven".