1923447945 has 16 divisors (see below), whose sum is σ = 3099660480. Its totient is φ = 1018457664.

The previous prime is 1923447941. The next prime is 1923447947. The reversal of 1923447945 is 5497443291.

It is not a de Polignac number, because 1923447945 - 2² = 1923447941 is a prime.

It is a super-3 number, since 3×1923447945³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1923447894 and 1923447903.

It is not an unprimeable number, because it can be changed into a prime (1923447941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459174 + ... + 463343.

It is an arithmetic number, because the mean of its divisors is an integer number (193728780).

Almost surely, 2^1923447945 is an apocalyptic number.

1923447945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1923447945 is a deficient number, since it is larger than the sum of its proper divisors (1176212535).

1923447945 is a wasteful number, since it uses less digits than its factorization.

1923447945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922664.

The product of its digits is 1088640, while the sum is 48.

The square root of 1923447945 is about 43857.1310621203. The cubic root of 1923447945 is about 1243.6365551604.

The spelling of 1923447945 in words is "one billion, nine hundred twenty-three million, four hundred forty-seven thousand, nine hundred forty-five".