923197393 has 4 divisors (see below), whose sum is σ = 977503140. Its totient is φ = 868891648.

The previous prime is 923197351. The next prime is 923197411. The reversal of 923197393 is 393791329.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393791329 = 491 ⋅802019.

It can be written as a sum of positive squares in 2 ways, for example, as 288762049 + 634435344 = 16993^2 + 25188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-923197393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (923192393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27152848 + ... + 27152881.

It is an arithmetic number, because the mean of its divisors is an integer number (244375785).

Almost surely, 2^923197393 is an apocalyptic number.

It is an amenable number.

923197393 is a deficient number, since it is larger than the sum of its proper divisors (54305747).

923197393 is a wasteful number, since it uses less digits than its factorization.

923197393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54305746.

The product of its digits is 275562, while the sum is 46.

The square root of 923197393 is about 30384.1635231250. The cubic root of 923197393 is about 973.7142440001.

The spelling of 923197393 in words is "nine hundred twenty-three million, one hundred ninety-seven thousand, three hundred ninety-three".