923917381 has 2 divisors, whose sum is σ = 923917382. Its totient is φ = 923917380.

The previous prime is 923917373. The next prime is 923917433. The reversal of 923917381 is 183719329.

923917381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643890625 + 280026756 = 25375^2 + 16734^2 .

It is a cyclic number.

It is not a de Polignac number, because 923917381 - 2³ = 923917373 is a prime.

It is a super-2 number, since 2×923917381² = 1707246653827798322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (923917301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461958690 + 461958691.

It is an arithmetic number, because the mean of its divisors is an integer number (461958691).

Almost surely, 2^923917381 is an apocalyptic number.

It is an amenable number.

923917381 is a deficient number, since it is larger than the sum of its proper divisors (1).

923917381 is an equidigital number, since it uses as much as digits as its factorization.

923917381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 923917381 is about 30396.0092939846. The cubic root of 923917381 is about 973.9673066733.

The spelling of 923917381 in words is "nine hundred twenty-three million, nine hundred seventeen thousand, three hundred eighty-one".