923779746381 has 4 divisors (see below), whose sum is σ = 1231706328512. Its totient is φ = 615853164252.

The previous prime is 923779746349. The next prime is 923779746389. The reversal of 923779746381 is 183647977329.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 923779746381 - 2⁵ = 923779746349 is a prime.

It is a super-2 number, since 2×923779746381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (923779746389) 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, 153963291061 + ... + 153963291066.

It is an arithmetic number, because the mean of its divisors is an integer number (307926582128).

Almost surely, 2^923779746381 is an apocalyptic number.

It is an amenable number.

923779746381 is a deficient number, since it is larger than the sum of its proper divisors (307926582131).

923779746381 is a wasteful number, since it uses less digits than its factorization.

923779746381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307926582130.

The product of its digits is 96018048, while the sum is 66.

The spelling of 923779746381 in words is "nine hundred twenty-three billion, seven hundred seventy-nine million, seven hundred forty-six thousand, three hundred eighty-one".