923817641389 has 2 divisors, whose sum is σ = 923817641390. Its totient is φ = 923817641388.

The previous prime is 923817641377. The next prime is 923817641399. The reversal of 923817641389 is 983146718329.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 923530610025 + 287031364 = 961005^2 + 16942^2 .

It is a cyclic number.

It is not a de Polignac number, because 923817641389 - 2²³ = 923809252781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (923817641399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461908820694 + 461908820695.

It is an arithmetic number, because the mean of its divisors is an integer number (461908820695).

Almost surely, 2^923817641389 is an apocalyptic number.

It is an amenable number.

923817641389 is a deficient number, since it is larger than the sum of its proper divisors (1).

923817641389 is an equidigital number, since it uses as much as digits as its factorization.

923817641389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 61.

The spelling of 923817641389 in words is "nine hundred twenty-three billion, eight hundred seventeen million, six hundred forty-one thousand, three hundred eighty-nine".