923215387541 has 2 divisors, whose sum is σ = 923215387542. Its totient is φ = 923215387540.

The previous prime is 923215387499. The next prime is 923215387543. The reversal of 923215387541 is 145783512329.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 910526266225 + 12689121316 = 954215^2 + 112646^2 .

It is a cyclic number.

It is not a de Polignac number, because 923215387541 - 2²⁶ = 923148278677 is a prime.

Together with 923215387543, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 923215387541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (923215387543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461607693770 + 461607693771.

It is an arithmetic number, because the mean of its divisors is an integer number (461607693771).

Almost surely, 2^923215387541 is an apocalyptic number.

It is an amenable number.

923215387541 is a deficient number, since it is larger than the sum of its proper divisors (1).

923215387541 is an equidigital number, since it uses as much as digits as its factorization.

923215387541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 50.

The spelling of 923215387541 in words is "nine hundred twenty-three billion, two hundred fifteen million, three hundred eighty-seven thousand, five hundred forty-one".