1923011945 has 16 divisors (see below), whose sum is σ = 2534682240. Its totient is φ = 1394072064.

The previous prime is 1923011939. The next prime is 1923011947. The reversal of 1923011945 is 5491103291.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1923011945 - 2²⁶ = 1855903081 is a prime.

It is a super-3 number, since 3×1923011945³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1923011947) 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, 437864 + ... + 442233.

It is an arithmetic number, because the mean of its divisors is an integer number (158417640).

Almost surely, 2^1923011945 is an apocalyptic number.

It is an amenable number.

1923011945 is a deficient number, since it is larger than the sum of its proper divisors (611670295).

1923011945 is a wasteful number, since it uses less digits than its factorization.

1923011945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880144.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1923011945 is about 43852.1600950284. The cubic root of 1923011945 is about 1243.5425804288.

The spelling of 1923011945 in words is "one billion, nine hundred twenty-three million, eleven thousand, nine hundred forty-five".